Economic aspects of long-term left ventricular assist device treatment for chronic heart failure.

AIMS: Technological advances and the current shortage of donor organs have contributed to an increase in the number of left ventricular assist device (LVAD) implantations in patients with end-stage heart failure. Demographic change and medical progress might raise the number of these patients, resulting in a further increase in the number of LVAD implantations. The aim of this study was to evaluate the long-term costs of LVAD therapy and identify diagnoses resulting in expensive stays. METHODS AND RESULTS: In this retrospective analysis of prospectively collected data, all patients after implantation of a second- or third-generation LVAD by 31 March 2022 were included. In addition to demographic and survival data, revenues and case mix points were determined for each patient. Of the 163 patients included, 75.5% were male. The mean age at LVAD implantation was 52 ± 14 years. The mean survival was 1458 ± 127 days. During follow-up, the total inpatient treatment time per patient was 70 ± 87 days. The average duration of outpatient treatment was 55.1%, based on the total duration of support. The average revenue per patient for the implant stay was $193 192.35 ± $111 801.29, for inpatient readmissions $52 068.96 ± $116 630.00, and for outpatient care $53 195.94 ± $62 363.53. CONCLUSIONS: LVAD implantation in patients with end-stage heart failure leads to improved survival but a significant increase in treatment costs. Further multi-centre studies are necessary in order to be able to assess the effects of long-term LVAD treatment on the healthcare system.

Calcium channel blockers and clinical outcomes in patients with continuous-flow left ventricular assist devices.

AIMS: Current guidelines suggest calcium channel blockers (CCBs) as the second or third option for blood pressure management in patients with left ventricular assist device (LVAD). However, the clinical outcomes of patients with LVAD who receive CCBs remain unclear. Our study aims to analyse the association of CCBs with clinical outcomes in patients after LVAD implantation. METHODS AND RESULTS: This is a retrospective analysis based on the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) from 2006 to 2017, and adult patients who were alive with LVAD and CCB treatment information at 6 months after implantation were included. Among 10 717 patients, 1369 received CCBs 6 months after implantation, and there was an increasing trend of CCB use after LVAD. Patients receiving CCB therapy at 6 months had a similar 5 year survival rate to those not receiving CCB [49.6%, 95% confidence interval (CI): 47.5-51.7% vs. 51.1%, 95% CI: 45.3-56.7%]. In both Cox and competing risk regressions after adjusting for confounding factors, CCB treatment at 6 months after implantation was not associated with long-term mortality [hazard ratio (HR): 1.03, 95% CI: 0.91-1.17, P = 0.624 and subdistribution HR (SHR): 1.07, 95% CI: 0.95-1.22, P = 0.260]. Consistently, in time-varying models, CCB treatment was not linked to long-term mortality (HR: 0.97, 95% CI: 0.87-1.09, P = 0.682 and SHR: 1.05, 95% CI: 0.94-1.18, P = 0.359). This null association remained in subgroup analysis according to device strategy and propensity-matching analyses. Neurological dysfunction, stroke, bleeding, rehospitalization, and renal dysfunction were more likely to occur among those with CCB when compared with those without CCB treatment. CONCLUSIONS: In patients with LVAD, CCB therapy fails to show benefits in long-term survival and is associated with increased incidences of neurological dysfunction, bleeding, renal dysfunction, and rehospitalization.

[Mitral valve: When conservative, when surgical, when interventional therapy?] / Mitralklappe: wann konservativ, wann operativ, wann interventionell?

The management of severe symptomatic mitral regurgitation is in contrast to the aortic-valve-intervention more challenging due to the complex mitral-valve anatomy. In primary mitral regurgitation surgical therapy is recommended, whereas there are various therapeutic options in secondary mitral regurgitation. Besides the established mitral-valve Transcatheter Edge-to-Edge-Repair (M-TEER) and the interventional annuloplasty - devices dynamic developments have recently been made in the field of Transcatheter Mitral Valve Replacement-therapy (TMVR). This article surveys the current recommendations and available therapeutic options in mitral regurgitation.

Outcomes of aortic valve replacement via partial upper sternotomy versus conventional aortic valve replacement in obese patients.

OBJECTIVES: Excellent outcomes after minimally invasive aortic valve replacement (mini-AVR) have been reported. Therefore, mini-AVR has become a popular treatment option in many cardiac surgery centres. However, whether obese patients particularly benefit from mini-AVR remains unclear. The aim of the present study was to evaluate outcomes of AVR performed through partial upper sternotomy compared to AVR through a full sternotomy (full-AVR) in obese patients. METHODS: We retrospectively reviewed the medical records of all patients who underwent isolated AVR at our institution, and 217 consecutive obese [body mass index (BMI) >30 kg/m2] patients were identified. Outcomes of the mini-AVR group were compared with the full-AVR group. RESULTS: One hundred and twenty-six patients underwent mini-AVR and 91 patients had full-AVR. The mean age and BMI were 69.8 ± 10.4 years and 32.6 ± 3.1 kg/m2 in the mini-AVR group compared to 70.0 ± 10.5 years and 33.1 ± 3.0 kg/m2 in the full-AVR group. Mortality, myocardial infarction, stroke, renal failure and surgical site infections were equivalent. Mini-AVR was associated with decreased ventilation time [6 h (minimum, min 3 h; maximum, max 76 h) vs 8 h (min 3 h; max 340 h); P = 0.004], shorter intensive care unit (ICU) stay [2 days (min 1 day; max 25 days) vs 4 days (min 1 day; max 35 days); P = 0.031] and reduced transfusion requirements (26.5% vs 56.0%; P = 0.004). Total duration of hospital stay as well as postoperative pain levels were comparable. CONCLUSIONS: Patient safety was not affected by mini-AVR. Significant benefits in terms of decreased transfusion requirements, ventilator times and ICU times were found in the mini-AVR group. Consequently, mini-AVR, performed through partial upper sternotomy, should also be routinely offered to obese patients.

Early outcomes in re-do operation after acute type A aortic dissection: results from the multicenter REAAD database.

This study provides early results of re-operations after the prior surgical treatment of acute type A aortic dissection (AAD) and identifies risk factors for mortality. Between May 2003 and January 2014, 117 aortic re-operations after an initial operation for AAD (a mean time from the first procedure was 3.98 years, with a range of 0.1-20.87 years) were performed in 110 patients (a mean age of 59.8 ± 12.6 years) in seven European institutions. The re-operation was indicated due to a proximal aortic pathology in ninety cases: twenty aortic root aneurysms, seventeen root re-dissections, twenty-seven aortic valve insufficiencies and twenty-six proximal anastomotic pseudoaneurysms. In fifty-eight cases, repetitive surgical treatment was subscripted because of distal aortic pathology: eighteen arch re-dissections, fifteen arch dilation and twenty-five anastomotic pseudoaneurysms. Surgical procedures comprised a total of seventy-one isolated proximals, thirty-one isolated distals and fifteen combined interventions. In-hospital mortality was 19.6 % (twenty-three patients); 11.1 % in patients with elective/urgent indication and 66.6 % in emergency cases. Mortality rates for isolated proximal, distal and combined operations regardless of the emergency setting were 14.1 % (10 pts.), 25.8 % (8 pts.) and 33.3 % (5 pts.), respectively. The causes of death were cardiac in eight, neurological in three, MOF in five, sepsis in two, bleeding in three and lung failure in two patients. A multivariate logistic regression analysis revealed that risk factors for mortality included previous distal procedure (p = 0.04), new distal procedure (p = 0.018) and emergency operation (p < 0.001). New proximal procedures were not found to be risk factors for early mortality (p = 0.15). This multicenter experience shows that the outcome of REAAD is highly dependent on the localization and extension of aortic pathology and the need for emergency treatment. Surgery in an emergency setting and distal re-do operations after previous AAD remain a surgical challenge, while proximal aortic re-operations show a lower mortality rate. Foresighted decision-making is needed in cases of AAD repair, as the results are essential preconditions for further surgical interventions.

Can Perioperative Right Ventricular Support Prevent Postoperative Right Heart Failure in Patients With Biventricular Dysfunction Undergoing Left Ventricular Assist Device Implantation?

OBJECTIVES: Depending on the pre-existing condition of the right ventricle (RV), left ventricular assist device (LVAD) implantation may have a detrimental effect on RV function, subsequently leading to right heart failure. This study details the authors' experience with perioperative mechanical RV support in patients with biventricular impairment but primarily scheduled for isolated LVAD implantation. DESIGN: Retrospective study. SETTING: Two center study, university hospital. PARTICIPANTS: This study included LVAD recipients with preoperative biventricular impairment who received an additional right ventricular assist device (RVAD) after a failed weaning attempt from cardiopulmonary bypass due to acute RV failure. INTERVENTIONS: Outcomes of 25 patients who underwent LVAD and unplanned temporary RVAD implantation were analyzed. MEASUREMENTS AND MAIN RESULTS: All patients experienced significant preoperative RV impairment (tricuspid annular plane systolic excursion: 10.2±26.3 mm; right atrium pressure: 17.9±10.4 mmHg) and pulmonary hypertension (pulmonary artery pressure: 54.8±25.7 mmHg). In 15 patients, additional tricuspid valve annuloplasty was performed. Mean duration of temporary RVAD support was 11.1±7.2 days. In 23 patients (92%), the RVAD was removed successfully. None of the patients developed RV failure after RVAD removal. Hospital survival and the 1-year survival rate of the study group were 68% and 56%, respectively. CONCLUSIONS: The results of perioperative RVAD support in LVAD recipients with biventricular dysfunction are encouraging. Temporary RVAD support allows an already compromised RV to become attuned to the hemodynamic conditions after LVAD implantation. This strategy provides patients with preoperative impaired RV function a high likelihood to permanently undergo LVAD support only.

Cardiac reoperations in octogenarians: Do they really benefit?

AIM: According to the demographic development of our society, the numbers of octogenarians referred to cardiac surgery are continuously growing. Although the benefit of first-time cardiac procedures for these patients is well documented, the fate of octogenarians after redo-procedures, with special regard to long-term survival, functional status and quality of life, is poorly investigated. METHODS: We retrospectively identified 84 consecutive patients aged ≥80 years, who underwent a cardiac reoperation at the department for Cardiothoracic Surgery in the Heart & Vessel Center Bad Bevensen between January 2007 and 2013. Demographic profiles as well as operative data were analyzed, and the patients were prospectively followed. Patient's functional status and quality of life were assessed with the Barthel Index, New York Heart Association class and the short form-12 questionnaire. RESULTS: The mean age of the study group (61 men, 23 women) was 81.9 ± 1.9 years. Most redo-procedures were carried out after primary coronary artery bypass grafting (65%), primary aortic valve replacement (21%) and primary mitral valve replacement (6%). The most frequent actual surgical procedures were combined coronary artery bypass grafting and aortic valve replacement (26%), isolated coronary artery bypass grafting (19%), and isolated aortic valve replacement (19%). The mean length of hospital stay was 17 ± 15 days. In-hospital mortality counted for 32.1%. During follow up (29 ± 20 months) a further 19.0% of the patients died. The Barthel Index of the survivors was 89 ± 17 and their mean New York Heart Association class was 2 ± 1. A total of 93% of the patients were living at home. Summary scores of physical and mental health of the short form-12 questionnaire equalled those of an age- and sex-matched normative population. CONCLUSIONS: Despite high perioperative mortality, results document a sustainable recovery of the survivors offering the prospect of a highly independent and satisfying life. Therefore, advanced age alone should not be a contraindication for redo cardiac interventions. Geriatr Gerontol Int 2016; 16: 1138-1144.

Pulmonary Bleeding During Right Ventricular Support After Left Ventricular Assist Device Implantation.

OBJECTIVES: Right heart failure still occurs in up to 20% of patients after implantation of a left ventricular assist device (LVAD). One treatment option for these patients is the implantation of a temporary right ventricular assist device (RVAD). Experimental data suggest that non-pulsatile perfusion of the lungs is associated with an increased rate of pulmonary hemorrhage. The aim of this study was to determine the incidence of pulmonary bleeding complications in these patients. DESIGN: Observational study. SETTING: Single center, university hospital. PARTICIPANTS: This study included patients undergoing LVAD implantation for end-stage heart failure and subsequent implantation of a temporary right ventricular support system. INTERVENTIONS: In this study, 25 patients who underwent LVAD and additional temporary RVAD implantation were screened for pulmonary bleeding complications. MEASUREMENTS AND MAIN RESULTS: The mean Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) level at the time of LVAD implantation was 2.84. All patients experienced severe right ventricular failure (tricuspid annular plane systolic excursion [TAPSE], 10.16±26.3 mm) and severe pulmonary hypertension (right atrial [RA] pressure, 56.21±15.58 mmHg). Average duration of right ventricular support was 11.12±7.20 days, with right ventricular support being administered to 14 patients for more than 7 days. Seventeen patients were weaned successfully from right ventricular support after a mean support duration of 5 days. Five patients developed pulmonary bleeding complications, diagnosed using computed tomography scan and bronchoscopy. All bleeding occurred after postoperative day 7 and was associated with RVAD flow of more than 4 L/min within 24 hours before bleeding occurred. CONCLUSIONS: The data presented in this study suggested that right ventricular support for more than 7 days and a blood flow greater than 4 L/min were associated with pulmonary bleeding complications. This should be taken into consideration when temporary right ventricular support after LVAD implantation is planned.

Non-elective cardiac surgery in octogenarians: Do these patients benefit in terms of clinical outcomes and quality of life?

AIM: The general assumption that non-elective cardiac procedures in octogenarians are related to poor postoperative outcomes and quality of life (QOL) might lead to a non-justified exclusion of elderly patients from surgical treatment. The aim of the present study was to assess survival, functional outcome and quality of life of octogenarians undergoing non-elective cardiac surgery. METHODS: Between 2009 and 2011, 62 consecutive octogenarians (mean age 83.5 ± 3.5 years) underwent urgent (n = 33) or emergency (n = 29) cardiac surgery. In 69% of patients, coronary artery bypass grafting was carried out, and 24% of patients underwent coronary artery bypass grafting plus valve surgery. Preoperative risk, as well as the postoperative course, was analyzed. All discharged patients were contacted to gain information about survival, functional capacity and QOL using the Barthel Mobility Index and the Short Form 12 Health Survey questionnaire. Results were compared with age-adjusted population data. RESULTS: In-hospital mortality was 32.3% overall, 9.3% in urgent cases and 56.7% in emergency cases. After a mean follow-up period of 447 ± 359 days, survival of the discharged patients was 93.1% (urgent) and 76.9% (emergency), respectively. QOL measures of the survivors were equivalent to those of the general elderly population. Functional capacity, calculated with Barthel Index, was high in both groups (86 ± 13 and 81 ± 21). A total of 92% of the patients were living at home. CONCLUSIONS: Although non-elective cardiac surgery in the elderly is related to high in-hospital mortality, physical and psychological recovery of the survivors is encouraging. QOL equals that of the general elderly population, and good functional status offers a highly independent life. Therefore, age per se should not disqualify patients from urgent or emergency cardiac surgery.

Contributory Role of Fluorine 18-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Diagnosis and Clinical Management of Infections in Patients Supported With a Continuous-Flow Left Ventricular Assist Device.

BACKGROUND: The current study sought to demonstrate the advantages offered by fluorine 18-fluorodeoxyglucose ((18)F-FDG) positron emission tomography/computed tomography (PET/CT) in patients supported with continuous-flow left ventricular assist devices (CF-LVADs) in detecting infection and the consequent effect on clinical decisions. METHODS: Between April 2009 and September 2013, 40 PET examinations were performed in 31 patients (78.1% men; mean age, 51.0 ± 14.9 years) supported with a CF-LVAD. In group A (19 examinations in 14 patients), PET/CT was performed to detect infectious focus in patients without external signs of driveline involvement but with at least two of the following infection signs: recurrent fever, positive blood culture, or elevated infectious indicators. In group B (21 examinations in 17 patients), PET/CT aimed to assess the internal extension of infection in patients with external signs of driveline infection. RESULTS: In 50% of the cases of the patients in group A, abnormal (18)F-FDG uptake (9 patients) was related to VAD components. Matching the results with the final diagnosis, we reported 9 true-positive, 8 true-negative, no false-negative, and 2 false-positive findings. New information unrelated to VAD was found in 9 patients (50%): pneumonia in 3, colon diverticulitis in 3, sternal dehiscence in 1, paravertebral abscess in 1, and erysipelas in 1. In group B, superficial abnormal (18)F-FDG uptake was found at the piercing site of the driveline in 2 patients, deeper extension of infection along the driveline in 10, initial involvement of the pump housing in 2, and full involvement of the device in 4. These findings contributed to changing the clinical management in 84.2% of group A patients and in 85.7% of group B patients: 16 patients were scheduled for urgent transplantation, 2 underwent surgical revision of the driveline, 7 required prolonged antibiotic therapy, and 3 underwent colonoscopy. CONCLUSIONS: This single-center experience highlights the diagnostic value of PET/CT in detecting the localization and internal extension of infection to internal VAD components. Moreover, this information notably influences the therapeutic management.

Distortion of a hybrid stent graft following a frozen elephant trunk procedure.

We describe a case of an acute type A dissection, where technical problems during the frozen elephant trunk technique led to a distortion of the hybrid stent graft with severe stenosis of the thoracic aortic endoprosthesis. Interventional aortoplasty was performed to re-establish flow. This new technique bears some risk of technical failure and therefore should be applied only after careful considerations.

Central closed chest implantation of extracorporeal membrane oxygenation to prevent limb ischemia.

PURPOSE: Extracorporeal membrane oxygenation (ECMO) support is a widely accepted treatment option for patients with cardiogenic shock, but it is still related to a high incidence of severe complications and death. We present an alternative implantation technique to prevent life-threatening vascular complications.
 METHODS: Between January 2008 and January 2011, a total of 28 patients with acute myocardial failure and consecutive cardiogenic shock required ECMO as supportive treatment. Pre-implantation procedures were isolated CABG, CABG combined with mitral valve reconstruction or ventricular septal defect closure, respectively. The implantation of ECMO was performed by connecting the ascending aorta via an 8 mm Dacron prosthesis with the arterial line and percutaneous puncture of the femoral vein. The chest was closed after installation of ECMO was completed. The arterial line was directed subxyphoidally and removal was possible without thoracotomy.
 RESULTS: Average support duration was 8.7 ± 3.9 days. An additional intra-aortic balloon pump was used in 23 patients (89.3%). Cerebrovascular events occurred in 21.4% and gastrointestinal complications in 9.1%. Acute renal failure was treated with continuous renal replacement therapy in 64.3%. In eight cases a systemic infection had to be treated. One patient with pre-existing severe peripheral arterial disease suffered from limb malperfusion, requiring leg amputation. Twelve patients were successfully weaned from ECMO and 8 patients (28.6%) were discharged from hospital. 
 CONCLUSIONS: This alternative cannulation strategy offers effective cardiopulmonary support while minimizing the risk of limb hypo- or hyperperfusion without requiring reopening of the thorax.

Prolonged intensive care treatment of octogenarians after cardiac surgery: a reasonable economic burden?

OBJECTIVES: In accordance with the rising prevalence of octogenarians undergoing cardiac surgery, these patients utilize an increasing portion of intensive care unit (ICU) capacities, provoking economic and ethical concerns. In this study, we evaluated the outcomes and costs generated by the prolonged postoperative ICU treatment of octogenarians. METHODS: Between July 2009 and August 2010, 109 of 1063 patients required ICU treatment of at least 5 days after cardiac surgery. Patients were retrospectively assigned to either Group A (age <80, n = 86) or Group B (age ≥80, n = 23). Operative risk, mortality, length and costs of ICU treatment were analysed and compared. After 1 year, survival, quality of life (QOL) and functional status were assessed. RESULTS: Hospital mortality was 31.4% in Group A and 56.5% in Group B. Survivals of discharged patients after 1 year were 83% (Group A) and 80% (Group B), respectively. Log EuroSCORE I of octogenarians was significantly higher (30 ± 17 vs 20 ± 16, P < 0.001). No significant differences (Group A vs Group B) were found between the groups concerning length of ICU treatment (20 ± 21 vs 16 ± 14 days, P = 0.577) or costs (27 205 ± 29 316€ vs 21 821 ± 16 259€, P = 0.812). Functional capacity, calculated by using Barthel index, was high (Group A: 87 ± 22 and Group B: 67 ± 31, P = 0.108) and did not differ significantly between groups. QOL, measured with the short form-12 health survey, did not differ significantly between groups (physical health summary score: P = 0.27; mental health score: P = 0.885) and was comparable with values of the age-adjusted general population. CONCLUSIONS: Presented data propose that advanced age is correlated with a higher mortality, but not with prolonged ICU treatment or higher costs after cardiac surgery. Considering the encouraging functional status and QOL of the survivors, the financial burden caused by octogenarians is justified.

Survival, functional capacity, and quality of life after cardiac surgery followed by long-term intensive care stay.

BACKGROUND: The rising prevalence of multimorbid patients undergoing cardiac surgery often leads to prolonged postoperative intensive care unit (ICU) treatment. The fate of these patients after discharge is poorly investigated. This study is aimed to assess survival, functional outcome, and quality of life (QOL) in patients after an ICU stay of at least 5 days. MATERIALS AND METHODS: Between August 2009 and July 2010, 1,092 patients underwent various cardiac procedures. Of these patients, 119 required ICU treatment of at least 5 days. Preoperative characteristics as well as postoperative course were analyzed and the discharged patients were contacted after 1 year to gain information about survival, functional capacity, and QOL. RESULTS: European system for cardiac operative risk evaluation I of the patients was 22.3 ± 16.7. Mean ICU stay was 19 ± 20 days. Forty three patients (36.1%) died in the hospital, 1-year overall survival was 46.2%, and 1-year survival of the discharged patients was 72.4%. Barthel mobility index was 85, showing a satisfactory mobilization. QOL, assessed with short form 12 questionnaire, was comparable with the reference group. CONCLUSION: Long-term ICU treatment after cardiac surgery is related to a high in-hospital and follow-up mortality. The physical and psychological recovery of the survivors is encouraging, justifying the extensive engagement of hospital resources.

Suction-irrigation drainage: an underestimated therapeutic option for surgical treatment of deep sternal wound infections.

OBJECTIVES: Deep sternal wound infections are significant and severe complications following cardiac surgery and substantially influence perioperative morbidity and mortality. We present the experience of our department using two different surgical treatments over a three-year period. METHODS: Between January 2009 and December 2011, a total of 3274 cardiac procedures with complete median sternotomy were performed in our department. In 94 patients (3%), a deep sternal wound infection occurred, including sternal instability with consecutive surgical treatment. The patients either received wound debridement with sternum refixation and suction-irrigation drainage (SID; n = 72) or sternum refixation only (RF; n = 22) if there was sternal instability with limited signs of infection. SID was routinely installed for 7 days: the irrigation solution contained neomycin. In all cases, swabs were taken and analysed. The different methods were evaluated in respect of their clinical outcomes. RESULTS: The success rate-defined as single, uncomplicated procedure-of the SID treatment was 74%, compared with 59% of the isolated sternum refixation. Complications included continuous infection, recurrence of sternal instability and wound necrosis. Eighty-eight percent of the swabs in the SID group were positive, compared with 32% in the sternal refixation only group. The dominating pathogenic germs were coagulase-negative staphylococci and staphylococcus aureus. Mortality was 10% for the SID group and 5% for the RF group. CONCLUSIONS: Contrary to accepted opinion, the suction-irrigation drainage is an appropriate therapy for deep sternal wound infections. Nevertheless, deep sternal wound infections after cardiac surgery remain severe complications and are related to increased morbidity and mortality.

Presternal false aneurysm due to osseous arrosion of the right ventricle.

Right ventricular rupture after open heart surgery is a rare but severe postoperative complication. In most cases, right ventricular bleeding is associated with mediastinitis and either directly caused by inflammatory processes or iatrogenically through penetration of dehiscent sternal edges or vacuum-assisted closure therapy. We describe a case of right ventricular rupture due to osseous arrosion in a closed chest in the absence of mediastinitis which led to the creation of a massive presternal false aneurysm.

Surgery of the ascending aorta, root remodelling and aortic arch surgery with circulatory arrest through partial upper sternotomy: results of 50 consecutive cases.

OBJECTIVES: Partial upper sternotomy is a routine approach to aortic valve surgery. For surgery of the ascending aorta or the aortic arch, this method is not well established yet. METHODS: From October 2007 to October 2010, 50 consecutive patients underwent procedures of the ascending aorta and the aortic arch using partial upper sternotomy. Thirty-six patients underwent replacement or tightening of the ascending aorta, 11 patients received additional replacement of the proximal arch and in 3 cases, a complete replacement of the aortic arch was performed. Thirty-nine patients underwent additional aortic valve surgery. RESULTS: Mean operation time was 249 ± 51 min. Mean aortic cross-clamp and cardiopulmonary bypass time were 95 ± 27 and 141 ± 35 min, respectively. No conversion to conventional sternotomy was performed. All valves appeared competent on postoperative echocardiography. Survival was 100%. One re-exploration for bleeding was necessary. One stroke (2%) occurred, one pacemaker was implanted due to third-degree AV block and 16 patients (32%) experienced atrial fibrillation. One patient suffered from sternal wound infection. One patient needed reoperation due to severe aortic insufficiency on postoperative day 13. Median postoperative ventilation time was 13 h, median intensive care unit (ICU) and hospital stay were 22 h and 7 days, respectively. CONCLUSIONS: Results show that minimally invasive surgical procedures of the ascending aorta and the aortic arch may be performed safely, with an excellent clinical outcomes and superior cosmesis. Short ICU and hospital stay indicate the beneficial effects of reduced surgical trauma for patient recovery.

Alveolar recruitment strategy during cardiopulmonary bypass does not improve postoperative gas exchange and lung function.

Pulmonary dysfunction with impairment of lung function and oxygenation is one of the most serious problems in the early postoperative period after cardiac surgery. In this study we investigated the effect of alveolar recruitment strategy during cardiopulmonary bypass on postoperative gas exchange and lung function. This prospective randomized study included 32 patients undergoing elective myocardial revascularization with cardiopulmonary bypass. In 16 patients 5 cm H(2)O of positive end-expiratory pressure was applied after intubation and maintained until extubation (Group I). In the other 16 patients (group II) a positive end expiratory pressure (PEEP) of 5 cm H(2)O was maintained as well but was increased to 14 cm H(2)O every 20 min for 2 min during cross clamp. Measurements were taken preoperatively, before skin incision, before and after (3, 24, 48 h) cardiopulmonary bypass and before discharge (6th postoperative day). Postoperative gas exchange, extravascular lung water and lung function showed no significant difference between the groups. Postoperative pulmonary function variables were lower in both groups compared to baseline values. In patients with normal preoperative pulmonary function, application of an alveolar recruitment strategy during cardiopulmonary bypass does not improve postoperative gas exchange and lung function after cardiac surgery.

Carbon dioxide field flooding reduces neurologic impairment after open heart surgery.

BACKGROUND: Air emboli released from incompletely deaired cardiac chambers may cause neurocognitive decline after open heart surgery. Carbon dioxide (CO2) field flooding is reported to reduce residual intracavital air during cardiac surgery. A protective effect of carbon dioxide insufflation on postoperative brain function remains unproven in clinical trials. METHODS: Eighty patients undergoing heart valve operations by median sternotomy were randomly assigned to either CO2 insufflation (group I, n = 39) or unprotected controls (group II, n = 41). Preoperative evaluation included neurocognitive test batteries consisting of six different tests, and objective measurements of brain function by means of P300 wave auditory-evoked potentials (peak latencies, ms). Neurocognitive testing and P300 measurements were repeated on postoperative day 5. Neurocognitive deficit (ND) was defined as a 20% decrement in two or more tests. RESULTS: Preoperatively, P300 peak latencies did not differ between groups (374 +/- 75 vs 366 +/- 72 ms, not significant [n.s.]). Five days after surgery, P300 peak latencies were significantly shorter with CO2 protection as compared with the unprotected control group (group I: 390 +/- 68 ms, group II: 429 +/- 75 ms, p = 0.02). Clinical outcome was comparable as for mortality (group I: 1 patient; group II: 2 patients) and cerebrovascular events or confusional syndromes (group I: 5 patients; group II: 4 patients) or other clinical variables as intubation time or hospital stay. Neurocognitive test batteries did not reveal differences between groups. CONCLUSIONS: Shorter P300 peak latencies after surgery indicate less brain damage in patients who underwent heart valve operations with CO2 flooding of the thoracic cavity. Even if these findings were not supported by clinical results or neurocognitive test batteries in our cohort, carbon dioxide field flooding has proven efficiency and should be advocated for all patients undergoing open heart surgery.