Expansion of transcatheter aortic valve replacement in the United States.

BACKGROUND: Patterns of diffusion of TAVR in the United States (U.S.) and its relation to racial disparities in TAVR utilization remain unknown. METHODS: We identified TAVR hospitals in the continental U.S. from 2012-2017 using Medicare database and mapped them to Hospital Referral Regions (HRR). We calculated driving distance from each residential ZIP code to the nearest TAVR hospital and calculated the proportion of the U.S. population, in general and by race, that lived <100 miles driving distance from the nearest TAVR center. Using a discrete time hazard logistic regression model, we examined the association of hospital and HRR variables with the opening of a TAVR program. RESULTS: The number of TAVR hospitals increased from 230 in 2012 to 540 in 2017. The proportion of the U.S. population living <100 miles from nearest TAVR hospital increased from 89.3% in 2012 to 94.5% in 2017. Geographic access improved for all racial and ethnic subgroups: Whites (84.1%-93.6%), Blacks (90.0%- 97.4%), and Hispanics (84.9%-93.7%). Within a HRR, the odds of opening a new TAVR program were higher among teaching hospitals (OR 1.48, 95% CI 1.16-1.88) and hospital bed size (OR 1.44, 95% CI 1.37-1.52). Market-level factors associated with new TAVR programs were proportion of Black (per 1%, OR 0.78, 95% CI 0.69-0.89) and Hispanic (per 1%, OR 0.82, 95% CI 0.75-0.90) residents, the proportion of hospitals within the HRR that already had a TAVR program (per 10%, OR 1.07, 95% CI 1.03-1.11), P <.01 for all. CONCLUSION: The expansion of TAVR programs in the U.S. has been accompanied by an increase in geographic coverage for all racial subgroups. Further study is needed to determine reasons for TAVR underutilization in Blacks and Hispanics.

Sex bias in admission to tertiary-care centres for acute myocardial infarction and cardiogenic shock.

BACKGROUND: There are limited data on sex-specific outcomes and management of cardiogenic shock complicating ST-segment elevation myocardial infarction (CS-STEMI). We investigated whether any sex bias exists in the admission to revascularization capable hospitals (RCH) or intensive cardiac care units (ICCU) and its impact on in-hospital mortality. METHODS: We used the Spanish National Health System Minimum Basic Data from 2003 to 2015 to identify patients with CS-STEMI. The primary outcome was sex differences in in-hospital mortality. RESULTS: Among 340 490 STEMI patients, 20 262 (6%) had CS and 29.2% were female. CS incidence was higher in women than in men (7.9% vs 5.1%, P = .001). Women were older and had more hypertension and diabetes, and were less often admitted to RCH than men (from 58.7% in 2003 to 79.6% in 2015; and from 61.9% in 2003 to 85.3% in 2015; respectively, P = .01), and to ICCU centres (25.7% vs 29.2%, P = .001). Adjusted mortality was higher in women than men over time (from 79.5 ± 4.3% to 65.8 ± 6.5%; and from 67.8 ± 6% to 58.1 ± 6.5%; respectively, P < .001). ICCU availability was associated with higher use of Percutaneous coronary intervention (PCI) in women (46.8% to 67.2%; P < .001) but was even higher in men (54.8% to 77.4%; P < .001). In ICCU centres, adjusted mortality rates decreased in both sexes, but lower in women (from 74.9 ± 5.4% to 66.3 ± 6.6%) than in men (from 67.8 ± 6.0% to 58.1 ± 6.5%, P < .001). Female sex was an independent predictor of mortality (OR 1.18 95% CI 1.10-1.27, P < .001). CONCLUSIONS: Women with CS-STEMI were less referred to tertiary-care centres and had a higher adjusted in-hospital mortality than men.

The Ambulance Cardiac Chest Pain Evaluation in Scotland Study (ACCESS): A Prospective Cohort Study.

STUDY OBJECTIVE: To determine whether risk stratification in the out-of-hospital setting could identify patients with chest pain who are at low and high risk to avoid admission or aid direct transfer to cardiac centers. METHODS: Paramedics prospectively enrolled patients with suspected acute coronary syndrome without diagnostic ST-segment elevation on the ECG. The History, ECG, Age and Risk Factors (HEAR) score was recorded contemporaneously, and out-of-hospital samples were obtained to measure cardiac Troponin I (cTnI) level on a point-of-care device, to allow calculation of the History, ECG, Age, Risk Factors, and Troponin (HEART) score. HEAR and HEART scores less than or equal to 3 and greater than or equal to 7 were defined as low and high risk for major adverse cardiac events at 30 days. RESULTS: Of 1,054 patients (64 years [SD 15 years]; 42% women), 284 (27%) experienced a major adverse cardiac event at 30 days. The HEAR score was calculated in all patients, with point-of-care cTnI testing available in 357 (34%). A HEAR score less than or equal to 3 identified 32% of patients (334/1,054) as low risk, with a sensitivity of 84.9% (95% confidence interval [CI] 80.7% to 89%), whereas a score greater than or equal to 7 identified just 3% of patients (30/1,054) as high risk, with a specificity of 98.7% (95% CI 97.9% to 99.5%). A point-of-care HEART score less than or equal to 3 identified a similar proportion as low risk (30%), with a sensitivity of 87.0% (95% CI 80.7% to 93.4%), whereas a score greater than or equal to 7 identified 14% as high risk, with a specificity of 94.8% (95% CI 92.0% to 97.5%). CONCLUSION: Paramedics can use the HEAR score to discriminate risk, but even when used in combination with out-of-hospital point-of-care cTnI testing, the HEART score does not safely rule out major adverse cardiac events, and only a small proportion of patients are identified as high risk.

Bypassing out-of-hospital cardiac arrest patients to a regional cardiac center: Impact on hemodynamic parameters and outcomes.

INTRODUCTION: Current guidelines recommend systematic care for patients who experience out-of-hospital cardiac arrest (OHCA) and the development of cardiac arrest centers (CACs). However, data regarding prolonged transport time of these often hemodynamically unstable patients are limited. METHODS: Data from a prospective OHCA registry of a regional CAC collected between 2013 and 2017, when all OHCA patients from the district were required to be transferred directly to the CAC, were analyzed. Patients were divided into two subgroups: CAC, when the CAC was the nearest hospital; and bypass, when OHCA occurred in a region of another local hospital but the subject was transferred directly to the CAC (7 hospitals in the district). Data included transport time, baseline characteristics, hemodynamic and laboratory parameters on admission (systolic blood pressure, lactate, pH, oxygen saturation, body temperature, and initial doses of vasopressors and inotropes), and final outcomes (30-day in-hospital mortality, intensive care unit stay, days on artificial ventilation, and cerebral performance capacity at 1 year). RESULTS: A total of 258 subjects experienced OHCA in the study period; however, 27 were excluded due to insufficient data and 17 for secondary transfer to CAC. As such, 214 patients were analyzed, 111 in the CAC group and 103 in the bypass group. The median transport time was significantly longer for the bypass group than the CAC group (40.5 min [IQR 28.3-55.0 min] versus 20.0 min [IQR 13.0-34.0], respectively; p˂0.0001). There were no differences in 30-day in-hospital mortality, 1-year neurological outcome, or median length of mechanical ventilation. There were no differences in baseline characteristics, initial hemodynamic parameters on admission, catecholamine dosage(s). CONCLUSION: Individuals who experienced OHCA and taken to a CAC incurred significantly prolonged transport times; however, hemodynamic parameters and/or outcomes were not affected. These findings shows the safety of bypassing local hospitals for a CAC.

Association between accessibility to emergency cardiovascular centers and cardiovascular mortality in Japan.

OBJECTIVE: The aim of this study was to examine the association between accessibility to cardiovascular emergency centers and cardiovascular mortality in Japan. DESIGN: A semi-ecological study. SETTING: Three databases were generated: accessibility to emergency cardiovascular centers, population records and death records. MAIN OUTCOME MEASURES: The standardized mortality ratio (SMR) for cardiovascular disease was adjusted by age and sex. Accessibility was represented by transfer time, number of cardiovascular emergency hospitals, and the proportion of habitable areas. Combinations of the three were divided into Categories 1-8 from the worst to the best, and the association with SMR was analyzed. RESULTS: There were 1998 cardiovascular emergency hospitals. The median of crude mortality was 0.16%. The median SMR of the reference Category 8 (transfer time <30 min and habitable area ≥50% with cardiovascular emergency hospitals) was 0.96, but that of the low accessibility Category 1 (transfer time ≥30 min and habitable area <50% without cardiovascular emergency hospitals) was 1.10. The SMR of accessibility Category 1 : Category 8 was 1.18 (95% confidence interval: 1.14-1.21). CONCLUSIONS: Decreased accessibility to cardiovascular emergency hospitals was associated with increased SMR. Areas with less accessibility and higher cardiovascular mortality were characterized by geographical variability in Japan.

The burden of acute myocardial infarction after a regional cardiovascular center project in Korea.

OBJECTIVE: The aim of this study was to examine the impact of a government-directed regional cardiovascular center (RCVC) project on the length of stay (LOS) and medical costs due to acute myocardial infarction (AMI). DESIGN: A retrospective claim data review. SETTING: Forty hospitals including four RCVCs in Korea. PARTICIPANTS: A total of 1469 AMI patients who visited a RCVC in two regions between February 2009 and December 2011. INTERVENTIONS: RCVC project has been fostering specialized center by region for management of cardiovascular disease. It has built a system that could receive intensive care quickly within 3 h when disease occurred. MAIN OUTCOME MEASURES: Changes in the LOS and cost were evaluated using the difference-in-differences (DIDs) method combined with propensity score matching (1:1) and multilevel analysis with adjustment for patient's and institutional factors. RESULTS: The net effect of RCVC project implementation showed decline of LOS (-0.71 days) and total medical costs (-797 US dollars) by DID. After the RCVC project, the LOS for patients with AMI hospitalized in a RCVC was decreased by 8.9% (ß = -0.094, P = 0.041) compared with patients hospitalized in a hospital not designed as a RCVC. Compared with costs before the RCVC project, they were decreased by 11.5% (ß = -0.122, P = 0.004). CONCLUSIONS: We provided evidence regarding the change in the societal burden due to AMI after regionalization. Although there was a reduction of LOS and direct medical costs reported in limited number of regionalized hospitals, in the long term we can anticipate an expanding impact in all regionalized hospitals.

Benefit of immediate beta-blocker therapy on mortality in patients with ST-segment elevation myocardial infarction.

OBJECTIVES: Despite the recommendations to initiate ß-blockade to all patients with an ST-segment elevation myocardial infarction, data concerning the timing of the administration of ß-blockers are controversially discussed. In view of these controversies, we analyzed the effect of immediate vs. delayed ß-blockade on all-cause mortality of patients with ST-segment elevation myocardial infarction in the Lower Austrian Myocardial Infarction Network. DESIGN: Nonrandomized, prospective observational cohort study. SETTING: Myocardial infarction network including the out-of-hospital emergency services, five primary-care hospitals and a percutaneous coronary intervention-capable hospital in the western part of Lower Austria. PATIENTS: The data of all patients with ST-segment elevation myocardial infarction defined according to the American Heart Association criteria and treated according to the treatment protocol of the network were consecutively collected. For the purpose of survival analyses, the baseline survival time was set to 48 hours after the first electrocardiogram, and in all patients with recurrent MI within the observational period, only the first MI was regarded. INTERVENTIONS: The treatment protocol recommended either the immediate oral administration of 2.5 mg bisoprolol (within 30 min after the first electrocardiogram) or 24 hours after acute myocardial infarction (delayed ß-blockade). MEASUREMENTS AND MAIN RESULTS: In total, out of the 664 patients with ST-segment elevation myocardial infarction, 343 (n = 52%) received immediate ß-blockade and 321 (48%) received delayed ß-blockade. The probability of any death (baseline survival time: 48 hours after first electrocardiogram; 640 patients) was 19.2% in the delayed treatment group and 10.7% in the immediate treatment group (p = 0.0022). Also the probability of cardiovascular mortality was significantly lower in the immediate ß-blocker treatment group (immediate treatment group: 9 (5.2%); delayed treatment group: 30 (13.4%); p = 0.0002). Multivariable Cox regression analysis identified immediate ß-blocker therapy to be independently protective against death of any cause (odds ratio: 0.55, p = 0.033). CONCLUSION: Immediate ß-blocker administration in the emergency setting is associated with a reduction of all-cause and cardiovascular mortality in patients with ST-segment elevation myocardial infarction and seems to be superior to a delayed ß-blockade in our patient cohort.

EMS medical direction and prehospital practices for acute cardiovascular events.

OBJECTIVE: The purpose of this analysis was to determine whether there is an association between type of emergency medical services (EMS) medical direction and local EMS agency practices and characteristics specifically related to emergency response for acute cardiovascular events. METHODS: We surveyed 1,292 EMS agencies in nine states. For each cardiovascular prehospital procedure or practice, we compared the proportion of agencies that employed paid (full- or part-time) medical directors with the proportion of agencies that employed volunteer medical directors. We also compared the proportion of EMS agencies who reported direct interaction between emergency medical technicians (EMTs) and their medical director within the previous four weeks with the proportion of agencies who reported no direct interaction. Chi-square tests were used to assess statistical differences in proportion of agencies with a specific procedure by medical director employment status and medical director interaction. We repeated these comparisons using t-tests to evaluate mean differences in call volume. RESULTS: The EMS agencies with prehospital cardiovascular response policies were more likely to report employment of a paid medical director and less likely to report employment of a volunteer medical director. Similarly, agencies with prehospital cardiovascular response practices were more likely to report recent medical director interaction and less likely to report absence of recent medical director interaction. Mean call volumes for chest pain, cardiac arrest, and stroke were higher among agencies having paid medical directors (compared with agencies having volunteer medical directors) and agencies having recent medical director interaction (compared with agencies not having recent medical director interaction). CONCLUSIONS: Our study demonstrated that EMS agencies with a paid medical director and agencies with medical director interaction with EMTs in the previous four weeks were more likely to have prehospital cardiovascular procedures in place. Given the strong relationship that both employment status and direct interaction have with the presence of these practices, agencies with limited resources to provide a paid medical director or a medical director that can be actively involved with EMTs should be supported through partnerships and other interventions to ensure that they receive the necessary levels of medical director oversight.

Effects of geodemographic profiles on healthcare service utilization: a case study on cardiac care in Ontario, Canada.

BACKGROUND: Although literature has associated geodemographic factors with healthcare service utilization, little is known about how these factors - such as population size, age profile, service accessibility, and educational profile - interact to influence service utilization. This study fills this gap in the literature by examining both the direct and the moderating effects of geodemographic profiles on the utilization of cardiac surgery services. METHODS: We aggregated secondary data obtained from Statistics Canada and Cardiac Care Network of Ontario to derive the geodemographic profiles of Ontario and the corresponding cardiac surgery service utilization in the years between 2004 and 2007. We conducted a two-step test using Partial Least Squares-based structural equation modeling to investigate the relationships between geodemographic profiles and healthcare service utilization. RESULTS: Population size and age profile have direct positive effects on service utilization (ß = 0.737, p < 0.01; ß = 0.284, p < 0.01, respectively), whereas service accessibility is negatively associated with service utilization (ß = -0.210, p < 0.01). Service accessibility decreases the effect of population size on service utilization (ß = -0.606, p < 0.01), and educational profile weakens the effects of population size and age profile on service utilization (ß = -0.595, p < 0.01; ß = -0.286, p < 0.01, respectively). CONCLUSIONS: In this study, we found that (1) service accessibility has a moderating effect on the relationship between population size and service utilization, and (2) educational profile has moderating effects on both the relationship between population size and service utilization, and the relationship between age profile and service utilization. Our findings suggest that reducing regional disparities in healthcare service utilization should take into account the interaction of geodemographic factors such as service accessibility and education. In addition, the allocation of resources for a particular healthcare service in one area should consider the geographic distribution of the same services in neighboring areas, as patients may be willing to utilize these services in areas not far from where they reside.

NICE recommendations for the assessment of stable chest pain: assessing the early economic and service impact in the rapid-access chest pain service.

BACKGROUND: In 2010, guidelines published by the National Institute for Clinical Excellence (NICE) suggested a change in the way patients with stable chest pain of suspected cardiac origin were investigated. These guidelines removed exercise treadmill testing from routine use and introduced cardiac CT to regular use. OBJECTIVE: To investigate whether these guidelines had improved our service provision by reducing the number of further investigations required to make a diagnosis, and to see if our costs had increased now that the less expensive exercise treadmill tests were not recommended. METHODS: Clinic letters were used to assess patients pretest likelihood of coronary artery disease for two six-month cohorts of consecutive patients seen in the rapid access chest pain clinic (January-June 2010 and July-December 2011) using NICE published methodology, and to ascertain which investigations patients had. Using NICE modelled costs, we generated comparative hypothetical costs for each cohort and an average cost per patient. RESULTS: In the January-June 2010 cohort, 435 patients with chest pain were seen, and in July-December 2011, 334 patients were seen. In the pre-NICE guidelines cohort, 23% of patients required two investigations as compared with 11.4% in the post-NICE guidelines cohort, with no patient requiring three investigations as compared with 3% in the original cohort. There was no significant increase in costs per patient in the post-NICE guidance group. CONCLUSIONS: Implementing NICE guidance reduced the number of investigations needed per patient, and did not prove more expensive for our department in the short term.

Build it and they will come: outcomes from a successful cardiac rehabilitation program at an Aboriginal Medical Service.

OBJECTIVE: Cardiovascular disease (CVD) is the leading disease burden in Aboriginal Australians, but culturally appropriate cardiac rehabilitation programs are lacking. We evaluated the uptake and effects on lifestyle, and cardiovascular risk factors, of cardiac rehabilitation at an Aboriginal Medical Service (AMS). METHODS: The program involved weekly exercise and education sessions (through 'yarning') for Aboriginal people with or at risk of CVD. Participants' perceptions of the program and the impact on risk factors were evaluated following 8 weeks of attendance. RESULTS: In twenty-eight participants (20 females) who completed 8 weeks of sessions, body mass index (34.0 ± 5.1 v. 33.3 ± 5.2 kgm⁻²; P<0.05), waist girth (113 ± 14 v. 109 ± 13 cm; P<0.01) and blood pressure (135/78 ± 20/12 v. 120/72 ± 16/5 mmHg; P<0.05) decreased and 6- min walk distance increased (296 ± 115 v. 345 ± 135m; P<0.01). 'Yarning' helped identify and address a range of chronic health issues including medication compliance, risk factor review and chest pain management. CONCLUSIONS: AMS-based cardiac rehabilitation was well attended, and improved cardiovascular risk factors and health management. An AMS is an ideal location for managing cardiovascular health and provides a setting conducive to addressing a broad range of chronic conditions.

Regionalization of post-cardiac arrest care: implementation of a cardiac resuscitation center.

BACKGROUND: Guidelines recommend standardized treatment of post-cardiac arrest patients to improve outcomes. However, the infrastructure, resources, and personnel required to meet the complex needs of cardiac arrest victims remain a barrier to care. Given that regionalization of time-dependent high-acuity illness is an emerging paradigm, the aim of the present study was to develop and implement a regionalized approach to post-cardiac arrest care. METHODS: We performed a prospective observational study on all patients treated in a regionalized clinical pathway from November 2007 through June 2011. All patients were enrolled after admission to an urban academic medical center. Clinical data including arrest and treatment variables, complications, and outcome were collected on consecutive patients with the use of a preformatted standard data collection tool using Utstein criteria. RESULTS: A total of 220 patients were enrolled; 127 (58%) patients were local direct admissions from our community, and 93 (42%) were transferred from 1 of 24 outlying referral hospitals. One hundred six (48%, 95% CI 38%-53%) patients survived to hospital discharge. The primary outcome of hospital survival with good neurologic function was observed in 94 (43%, 95% CI 32%-48%). There was no difference in survival with good neurologic outcome among local and referred patients. Overall 1-year survival was 44% (95% CI 38%-51%). Among patients discharged from the hospital with good neurologic function, 93% (95% CI 85%-97%) remained alive at 1 year. CONCLUSION: Development of a regionalized approach to post-cardiac arrest care using previously established referral relationships is feasible, and implementation of such an approach was clinically effective in our region.

Do we need cardiac arrest centres in Australia?

The mortality rate post admission to hospital after successful resuscitation from out-of-hospital cardiac arrest is high, with significant variation between regions and individual institutions. While prehospital factors such as age, bystander cardiopulmonary resuscitation and total cardiac arrest time are known to influence outcome, several aspects of post-resuscitative care including therapeutic hypothermia, coronary intervention and goal-directed therapy may also influence patient survival. Regional systems of care have improved provider experience and patient outcomes for those with ST elevation myocardial infarction and life-threatening traumatic injury. In particular, hospital factors such as hospital size and interventional cardiac care capabilities have been found to influence patient mortality. This paper reviews the evidence supporting the possible development and implementation of Australian cardiac arrest centres.

Cost implications of implementing NICE guideline on chest pain in rapid access chest pain clinics: an audit and cost analysis.

BACKGROUND: Implementing the recently published National Institute for Health and Clinical Excellence (NICE) clinical guideline on chest pain (CG95) in rapid access chest pain clinics (RACPCs) could significantly impact on overall cost, while introducing new technology like cardiac computed tomography (CT) scanning. With the National Health Service (NHS) under pressure to make £20 billion savings, applying CG95 in RACPCs could be challenging. An audit enabled us to assess the cost implications. METHODS: A retrospective audit was performed of 204 consecutive cases attending Croydon RACPC from 13 July to 21 September 2010, on risk factors, demographics and planned first-line investigations. CG95 and three alternative strategies were mapped on the sample, and the estimated cost and volume of first-line investigations were compared with actual RACPC activities and costs. RESULTS: Application of CG95 resulted in significant increases in cost and volume of functional testing, cardiac CT scan angiography and invasive coronary angiography, with 42-43% overall cost increases. The application of three alternative strategies resulted in annual cost increases ranging from 0.1 to 33%. An alternative cost analysis showed annual savings of up to 24%. CONCLUSIONS: Implementing NICE CG95 can significantly increase the cost of RACPCs but alternative strategies could enable the introduction of new technology without significant cost increases and even significant savings.

Emergency department visits: we are not prepared.

Emergency department (ED) staff comments frequently about how patients are poorly prepared to answer important medical questions. To determine if the impression that patients were or were not prepared, a total of 309 patients were all asked a series of important medical questions and were graded as positive (or prepared) if they answered the question completely or negative (unprepared) if they partially answered, did not answer, or changed their answer during the ED stay. The patient population was older (mean age, 60 years) and was seen at 1 specialty hospital. Results indicated that many people were not prepared with information about their allergies, medications, medical and surgical histories, and some, even their physician's names. Patients were least prepared to know about an advance directive (79%) or to know their complete medical history (70%). Results indicated that most patients (99%) were not prepared to answer at least 1 or more important medical questions. The discussion considers why patients and others are not prepared for an ED visit and provides examples of ways to help people better prepare for such a visit.

Lactate in the acute phase of ST-elevation myocardial infarction treated with mechanical revascularization: a single-center experience.

AIMS: The prognostic role (if any) of lactate for early mortality in patients with ST-elevation myocardial infarction (STEMI) submitted to primary percutaneous coronary intervention (PCI) is so far not elucidated. We therefore assessed whether lactic acid (LA) was a prognostic predictor for early mortality in 807 patients with STEMI submitted to primary PCI consecutively admitted to our intensive cardiac care unit (ICCU) from January 1, 2006, to December 31, 2009. RESULT: Higher levels of LA were found in older patients (P = .025) and were associated with a progressive decline in estimated glomerular filtration rate (P < .001) and in ejection fraction (P < .001). The increase in LA values paralleled the progressive increase in glucose values, peak glycemia, troponin I, N-terminal pro-brain natriuretic peptide, and uric acid (P < .001, P < .001, P < .001, P = .018, and P = .006, respectively). The in-ICCU mortality rate was highest in the third LA tertile (P < .001). Lactate levels were independent predictors for in-hospital mortality only in patients with Killip classes III to IV (odds ratio [OR], 1.17; 95% confidence interval [CI], 1.05-1.30, P = .003). In addition, age (OR, 1.11; 95% CI, 1.03-1.19, P = .006) and leukocytes (OR, 1.17; 95% CI, 1.03-1.33, P = .015) were independent predictors for in-hospital mortality when adjusted for PCI failure. CONCLUSION: In patients with STEMI submitted to primary PCI, blood lactate is a prognostic marker for early mortality only in the subgroup with advanced Killip class. The degree of hemodynamic impairment (as indicated by Killip class), of myocardial ischemia (as inferred by troponin I), and glucose values are the main factors influencing lactate concentrations in the early phase of STEMI.

Simultaneous relationships between procedure volume and mortality: do they bias studies of mortality at specialty hospitals?

Specialty hospitals have lower mortality rates for cardiac revascularization than general hospitals, but previous studies have found that this advantage disappears after adjusting for patient characteristics and hospital procedural volume. Questions have been raised about whether simultaneous relationships between volume and mortality might have biased these analyses. We use two-stage least squares with Hospital Quality Alliance scores and estimated market size as instruments for mortality and volume to control for possible simultaneity. After this adjustment, it is still the case that specialty hospitals do not have an advantage over general hospitals in mortality rates after cardiac revascularization. We find evidence of simultaneity in the relationship between volume and mortality.

Regional impact of cardiac arrest center criteria on out-of-hospital transportation practices.

BACKGROUND: Cardiac arrest center (CAC) criteria are not well defined, nor is their potential impact on current emergency medical services (EMS) transportation practices for post-cardiac arrest (PCA) patients. In addition to the availability of emergent cardiac catheterization (CATH) and therapeutic hypothermia (TH), high-volume centers and those with PCA protocols have been associated with improved outcomes. Objectives. This study aimed 1) to identify the PCA treatment capabilities of receiving hospitals in a 10-county regional EMS system without official CAC designation and 2) to determine the proportion of PCA patients who are transported to hospitals meeting three proposed CAC definitions. We hypothesized that a majority of patients are already transported to hospitals that meet proposed CAC criteria. METHODS: We distributed a survey to 34 receiving hospitals to determine availability and volume of CATH, TH, a PCA protocol, and a 24-hour intensivist. We conducted a retrospective study of adult, nontrauma cardiac arrest patients transported with a pulse from 2006 to 2008 for 16 EMS agencies. The proportions of patients transported to hospitals meeting three CAC criteria were compared: criteria A (availability of CATH and TH), criteria B (criteria A, >200 CATHs per year, and a PCA protocol), and criteria C (criteria B and a 24-hour intensivist). RESULTS: Data were obtained from 31 of 34 hospitals (91.1%), of which 10 (32.3%) met criteria A, seven (22.6%) met criteria B, and six (19.4%) met criteria C. Of 1,193 cardiac arrest patients, 46 (3.9%) were excluded because of transport to a pediatric, closed, or out-of-region hospital. There were 335 patients (81.1%) with return of spontaneous circulation and a pulse present upon arrival at the destination facility transported to hospitals meeting criteria A, 304 patients (73.6%) transported to hospitals meeting criteria B, and 273 patients (66.1%) transported to hospitals meeting criteria C. CONCLUSIONS: In a region without official CAC designation, only one-third of hospitals meet basic CAC criteria (CATH and TH), but those facilities receive 81% of PCA patients. Fewer patients (66%) are transported to hospitals meeting more stringent CAC criteria. These data describe the potential impact of developing a CAC policy based on current transportation practices.

Process review of a departmental change from conventional coronary artery bypass grafting to totally arterial coronary artery bypass and its effects on the incidence and severity of postoperative stroke.

BACKGROUND: We evaluated the process of changing from conventional coronary artery bypass grafting (CABG) to totally arterial off-pump coronary artery bypass (TOPCAB) at a single heart center in Germany. METHODS: We (1) used multivariate statistical methods to assess real-time monitoring of OPCAB effects, (2) conducted a case review to assess preventable deaths and identify areas of improvement, (3) conducted a team survey, and (4) evaluated benchmarking results. RESULTS: All surgeons and assistants (n = 18) at this center were involved and were guided by the department head and one of the consultants, who was trained in this procedure in 2004 at the Leuven OPCAB school. The frequency of OPCAB operations increased abruptly in 2005 from 5% to 43% and then increased gradually to 67% (n = 546) by 2008 (total, 1781 OPCAB cases and 1563 on-pump cases). The in-hospital and 30-day mortality rates for OPCAB surgeries (n = 10 [0.6%] and 21 [1.2%], respectively) were lower than for on-pump surgeries (n = 27 [1.7%] and 26 [1.7%], respectively). Stroke rates were also lower for OPCAB surgeries (7 cases [0.4%] versus 15 cases [1%]). The lower risk of stroke in the OPCAB group was significant (P < .05) after risk adjustment. Monitoring curves and case reviews demonstrated a preventable death percentage of at least 30%. The attitude of the team was mostly positive because of the promising results (eg, fewer strokes, increasing TOPCAB popularity, and a top national rank). CONCLUSIONS: The change from conventional CABG to TOPCAB was effective in decreasing the incidence and severity of stroke, in developing a team routine and a positive team attitude, and in producing excellent benchmarking results. The presence of a training and communication deficiency at the beginning of the study suggested an area for further improvement. After 6 years TOPCAB had largely replaced conventional CABG.

[B hepatitis vaccination evaluated in population of non-medical staff members]. / Szczepienia ochronne przeciw wirusowemu zapaleniu watroby typu B, oceniane w populacji doroslych pacjentów niebedacych pracownikami sluzby zdrowia.

UNLABELLED: Hepatitis belongs to a group of diseases caused by different hepatotropic viruses, which are responsible for inflamation of the liver. The most common form of liver infection is hepatitis B virus (HBV). It is transmitted by blood and other body fluids. The infection can also occur during pregnancy--the fetus contact with mother physiological fluids, direct contact with infected blood, unprotected sexual contact and intravenous administration of drugs using of unsterile needles. Chronic hepatitis B accounts for approximately 80% of liver cancer. HBV constitutes a major epidemiological threat. According to statistical data over 2 billion people worldwide are infected. 60% of patients are non-symptomatic, while 40-50 develop disease symptoms. All this often lead to inflamation, cirrhosis hepatis and hepatocellular carcinoma. HBV vaccinaton presents the only effective way to prevent the disease. Therefore it is extremely important to make people fully aware of the disease. The aim of the study was to evaluate hepatitis virus B vaccination and hepatitis incidence rate in the patients, who are non-medical staff members. MATERIAL AND METHODS: Family Doctor Office and Cardiology Clinic patients were included in the study. The source of data was questionnaire concerning anti-hepatitis B vaccination and hepatitis occurrence. RESULTS: The research was conducted on a group of 312 patient (109 male and 203 female). In this group, 168 people got vaccinated against the hepatitis B (53.84%). 29 patients (9.29%) had little knowledge about such a possibility of immunization, while 17 people (5.44%) knew nothing about the vaccination. The most common reason for vaccination was preventive action (preparation for medical treatment)--83 people (49.40%). Only 10 people (3.20%) from the studied group got infected. The most frequent reason were medical procedures. CONCLUSIONS: In Poland, the number of people vaccinated against B hepatitis is still very low. Therefore it is necessary to run a nationwide informative campaign and to intensify pro-vaccination activities. All this is extremely important for prevention of serious complications such as: liver failure, cirrhosis hepatis and hapatocelluar carcinoma. In the studied group it was medical procedures that became the source of infection. To guard ourselves against such situations in future it is vital to introduce and follow septic and antiseptic regime.