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1.
Int J Eat Disord ; 55(5): 633-636, 2022 05.
Article in English | MEDLINE | ID: mdl-34997783

ABSTRACT

The exact medical complications, leading to the well-known high risk of death in patients with anorexia nervosa (AN), remain elusive. Such deaths are often abrupt with no satisfactory explanation. Suspected causes include cardiac QTc prolongation and, in turn, torsade de pointes (TdP). Psychotropic medications often prescribed to these patients are linked to QTc prolongation. AN is also presumed to cause heart failure due to malnutrition with increased susceptibility to QTc prolongation, and TdP, resulting in sudden cardiac death. Recent literature, however, is conflicting, and the likely cause of death may involve other cardiac abnormalities, such as low heart rate, abnormal heart rate variability, or increased QT dispersion. With an ongoing gap in research explaining the high mortality rate in AN, a compelling need to define the exact proximate causes of death in these patients remains. Because low serum potassium is the most common trigger for TdP, we postulate the early signal of sudden cardiac death, especially in patients with AN who purge, is hypokalemia. We also speculate that hypoglycemia could be a major factor in the sudden death of patients with AN as well as bradycardia or sinus arrest. A path forward to elucidate potential causes is offered.


Subject(s)
Anorexia Nervosa , Long QT Syndrome , Torsades de Pointes , Anorexia Nervosa/complications , DNA-Binding Proteins , Death, Sudden, Cardiac/etiology , Electrocardiography , Humans , Long QT Syndrome/complications , Torsades de Pointes/complications
2.
BMC Public Health ; 22(1): 1935, 2022 10 18.
Article in English | MEDLINE | ID: mdl-36258185

ABSTRACT

BACKGROUND: Community Heart Health Actions for Latinos at Risk (CHARLAR) is a promotora-led cardiovascular disease (CVD) risk-reduction program for socio-demographically disadvantaged Latinos and consists of 11 skill-building sessions. The COVID-19 pandemic has led to worsening health status in U.S. adults and necessitated transition to virtual implementation of the CHARLAR program. METHODS: A mixed-methods approach was used to evaluate virtual delivery of CHARLAR. Changes in health behaviors were assessed through a pre/post program survey. Results from virtual and historical (in-person delivery) were compared. Key informant interviews were conducted with promotoras and randomly selected participants and then coded and analyzed using a thematic approach. RESULTS: An increase in days of exercise per week (+ 1.52), daily servings of fruit (+ 0.60) and vegetables (+ 0.56), and self-reported general health (+ 0.38), were observed in the virtual cohort [all p < 0.05]. A numeric decrease in PHQ-8 (-1.07 p = 0.067) was also noted. The historical cohort showed similar improvements from baseline in days of exercise per week (+ 0.91), daily servings of fruit (+ 0.244) and vegetables (+ 0.282), and PHQ-8 (-1.89) [all p < 0.05]. Qualitative interviews revealed that the online format provided valuable tools supporting positive behavior change. Despite initial discomfort and technical challenges, promotoras and participants adapted and deepened valued relationships through additional virtual support. CONCLUSION: Improved health behaviors and CVD risk factors were successfully maintained through virtual delivery of the CHARLAR program. Optimization of virtual health programs like CHARLAR has the potential to increase reach and improve CVD risk among Latinos.


Subject(s)
COVID-19 , Cardiovascular Diseases , Adult , Humans , Pandemics , Health Promotion/methods , Hispanic or Latino , Cardiovascular Diseases/epidemiology , Cardiovascular Diseases/prevention & control
3.
Eur Heart J ; 42(39): 4040-4048, 2021 10 14.
Article in English | MEDLINE | ID: mdl-34430972

ABSTRACT

AIMS: In this secondary analysis of the VOYAGER trial, rivaroxaban 2.5 mg twice/day plus aspirin 100 mg/day was assessed in older adults. Advanced age is associated with elevated bleeding risk and unfavourable net benefit for dual antiplatelet therapy in chronic coronary artery disease. The risk-benefit of low-dose rivaroxaban in patients ≥75 years with peripheral artery disease (PAD) after lower extremity revascularization (LER) has not been described. METHODS AND RESULTS: The primary endpoint was a composite of acute limb ischaemia, major amputation, myocardial infarction, ischaemic stroke, or cardiovascular death. The principal safety outcome was thrombolysis in myocardial infarction (TIMI) major bleeding analysed by the pre-specified age cut-off of 75 years. Of 6564 patients randomized, 1330 (20%) were >75 years. Absolute 3-year Kaplan-Meier cumulative incidence rates for primary efficacy (23.4% vs. 19.0%) and safety (3.5% vs. 1.5%) endpoints were higher in elderly vs. non-elderly patients. Efficacy of rivaroxaban (P-interaction 0.83) and safety (P-interaction 0.38) was consistent irrespective of age. The combination of intracranial and fatal bleeding was not increased in patients >75 years (2 rivaroxaban vs. 8 placebo). Overall, benefits (absolute risk reduction 3.8%, number needed to treat 26 for the primary endpoint) exceeded risks (absolute risk increase 0.81%, number needed to harm 123 for TIMI major bleeding). CONCLUSION: Patients ≥75 years with PAD are at both heightened ischaemic and bleeding risk after LER. No excess harm with respect to major, intracranial or fatal bleeding was seen in older patients yet numerically greater absolute benefits were observed. This suggests that low-dose rivaroxaban combined with aspirin should be considered in PAD after LER regardless of age.


Subject(s)
Brain Ischemia , Peripheral Arterial Disease , Stroke , Aged , Aspirin/adverse effects , Drug Therapy, Combination , Factor Xa Inhibitors/adverse effects , Humans , Peripheral Arterial Disease/complications , Peripheral Arterial Disease/drug therapy , Peripheral Arterial Disease/surgery , Platelet Aggregation Inhibitors/adverse effects , Rivaroxaban/adverse effects , Stroke/drug therapy
4.
Ann Noninvasive Electrocardiol ; 26(1): e12769, 2021 01.
Article in English | MEDLINE | ID: mdl-32501623

ABSTRACT

A primigravida 26-year-old woman who had developed pre-eclampsia with malignant hypertension at 30 weeks of gestation suffered acute myocardial infarction two days postpartum. Electrocardiogram demonstrated diffuse ST-segment depression suggestive of subendocardial ischemia. Echocardiography demonstrated focal asymmetric left ventricular hypertrophy, with a characteristic "basal septal bulge", and a left ventricular mid-cavitary gradient of 51 mmHg. Coronary angiography revealed normal coronary arteries and vascular flow. Peripartum acute myocardial infarction is rare and portends a high mortality. However, to date, only one case of acute myocardial infarction associated with asymmetric left ventricular hypertrophy and pre-eclampsia has been described in the literature.


Subject(s)
Hypertrophy, Left Ventricular/complications , Myocardial Infarction/complications , Myocardial Ischemia/complications , Pre-Eclampsia/physiopathology , Acute Disease , Adult , Coronary Angiography/methods , Echocardiography/methods , Electrocardiography/methods , Female , Humans , Hypertrophy, Left Ventricular/diagnostic imaging , Hypertrophy, Left Ventricular/physiopathology , Myocardial Infarction/diagnostic imaging , Myocardial Infarction/physiopathology , Myocardial Ischemia/diagnostic imaging , Myocardial Ischemia/physiopathology , Pregnancy
5.
J Cardiovasc Electrophysiol ; 31(2): 432-439, 2020 02.
Article in English | MEDLINE | ID: mdl-31917489

ABSTRACT

BACKGROUND: Anorexia nervosa (AN) is associated with autonomic dysfunction and carries a high risk of sudden death, putatively attributed to ventricular tachyarrhythmias. To date, long-term cardiac monitoring has not been performed to confirm this speculation. METHODS AND RESULTS: We assessed the safety and acceptability of an insertable cardiac monitor (ICM) in patients with severe AN with markedly reduced body mass index (BMI), and investigated heart rate (HR) and rhythm before and after weight restoration. Autonomic function was assessed as HR response to a standardized activity protocol at baseline and four additional visits over 360 days. The Florida Patient Acceptance Survey (FPAS) was used to measure ICM acceptability. During a mean follow-up of 10 months, no ICM-related complications occurred and ICM was well-accepted by the 11 study participants (nine women, aged 19-59 years, baseline BMI = 12.7 ± 1.6 kg/m2 ). Both resting and peak HR increased with weight restoration and were directly associated with BMI (both P < .001). No ventricular tachyarrhythmias occurred during the study period, but two participants (18%) experienced eight sinus pauses (3.0-7.0 seconds) and three runs of supraventricular tachycardia. CONCLUSIONS: Long-term cardiac rhythm monitoring with an ICM is feasible, safe, and acceptable in patients with severe AN. Autonomic dysfunction in AN results in not only profound resting bradycardia, but also some degree of chronotropic incompetence, both of which improve with weight restoration. Clinically significant bradyarrhythmias are more common than ventricular tachyarrhythmias in AN, and may represent a competing underlying mechanism for the high risk of sudden death in this population.


Subject(s)
Anorexia Nervosa/complications , Arrhythmias, Cardiac/diagnosis , Autonomic Nervous System/physiopathology , Heart Rate , Heart/innervation , Telemetry , Action Potentials , Adult , Anorexia Nervosa/diagnosis , Anorexia Nervosa/physiopathology , Arrhythmias, Cardiac/etiology , Arrhythmias, Cardiac/physiopathology , Body Composition , Female , Humans , Male , Middle Aged , Nutritional Status , Pilot Projects , Predictive Value of Tests , Prospective Studies , Risk Assessment , Risk Factors , Severity of Illness Index , Telemetry/instrumentation , Time Factors , Young Adult
6.
Ann Noninvasive Electrocardiol ; 25(4): e12704, 2020 07.
Article in English | MEDLINE | ID: mdl-31549759

ABSTRACT

Computer-generated Bazett-corrected QT (QTcB) algorithms are common in clinical practice and can rapidly identify repolarization abnormalities, but accuracy is variable. This report highlights marked rate-corrected QT (QTc) interval prolongation not detected by the computer algorithm. A 26-year-old woman with anorexia nervosa was admitted with severe hypokalemia and ventricular ectopy. Computer-generated QTcB was 485 ms, while manual adjudication yielded a QTcB of 657 ms and a Fridericia-corrected QT (QTcF) interval of 626 ms using digital calipers. Computer-generated QTc intervals may aid in clinical decision-making. However, accuracy is variable, particularly in the setting of ectopy, and requires manual verification.


Subject(s)
Alkalosis/etiology , Anorexia Nervosa/complications , Electrocardiography/methods , Fluid Therapy/methods , Long QT Syndrome/diagnosis , Long QT Syndrome/etiology , Adult , Alkalosis/diagnosis , Alkalosis/therapy , Female , Humans , Long QT Syndrome/therapy
7.
Eat Weight Disord ; 23(4): 419-430, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29681012

ABSTRACT

Eating disorders are unique in that they inherently have much medical comorbidity both as a part of restricting-type eating disorders and those characterized by purging behaviors. Over the last three decades, remarkable progress has been made in the understanding and treatment of the medical complications of eating disorders. Yet, unfortunately, there is much research that is sorely needed to bridge the gap between current medical knowledge and more effective and evidence-based medical treatment knowledge. These gaps exist in many different clinical areas including cardiology, electrolytes, gastrointestinal and bone disease. In this paper, we discuss some of the knowledge gap areas, which if bridged would help develop more effective medical intervention for this population of patients.


Subject(s)
Evidence-Based Medicine , Feeding and Eating Disorders , Knowledge Bases , Humans , Research
9.
J Gen Intern Med ; 31(8): 958-60, 2016 08.
Article in English | MEDLINE | ID: mdl-27021293

ABSTRACT

Since the release of the "2014 evidence-based guideline for the management of high blood pressure in adults: report from the panel members appointed to the Eighth Joint National Committee (JNC 8)", much controversy has ensued over the appropriate systolic blood pressure goal for those over the age of 60 years. This guideline suggested liberalizing the target for this population to <150 mmHg, moving away from previous guidelines suggesting a target of <140 mmHg. While some national quality measures have accepted the new relaxed blood pressure goal, the American Heart Association and American College of Cardiology have not. Recently published data show that millions of adults over 60 years of age would be classified as controlled using a threshold of <150 mmHg, but not with a target of <140 mmHg. In addition, emerging randomized trial evidence suggests that targeting a systolic blood pressure well below 140 mmHg is beneficial in older adults. In light of the improved health and vitality of older adults, and the steady decline in cardiovascular and cerebrovascular mortality over recent decades, we do not think it is in good judgment to liberalize the treatment target in adults less than 80 years of age.


Subject(s)
Antihypertensive Agents/therapeutic use , Blood Pressure Determination/standards , Hypertension/diagnosis , Hypertension/drug therapy , Aged , Aged, 80 and over , Antihypertensive Agents/pharmacology , Blood Pressure/drug effects , Blood Pressure/physiology , Blood Pressure Determination/methods , Female , Humans , Hypertension/epidemiology , Male , Middle Aged , Randomized Controlled Trials as Topic/methods , Randomized Controlled Trials as Topic/standards
10.
Int J Eat Disord ; 49(3): 238-48, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26710932

ABSTRACT

OBJECTIVE: Anorexia nervosa portends the highest mortality among psychiatric diseases, despite primarily being a disease of adolescents and younger adults. Although some of this mortality risk is attributable to suicide, many deaths are likely cardiovascular in etiology. Recent studies suggest that adverse myocardial structural changes occur in this condition, which could underlie the increased mortality. Given limited prevalence of severe anorexia there is a paucity of clinical and autopsy data to discern an exact cause of death. METHODS: Given this background we conducted a systematic review of the medical literature to provide a contemporary summary of the pathobiologic sequelae of severe anorexia nervosa on the cardiovascular system. We sought to elucidate the impact of anorexia nervosa in four cardiovascular domains: structural, repolarization/conduction, hemodynamic, and peripheral vascular. RESULTS: A number of cardiac abnormalities associated with anorexia nervosa have been described in the literature, including pericardial and valvular pathology, changes in left ventricular mass and function, conduction abnormalities, bradycardia, hypotension, and dysregulation in peripheral vascular contractility. Despite the prevalent theory that malignant arrhythmias are implicated as a cause of sudden death in this disorder, data to support this causal relationship are lacking. DISCUSSION: It is reasonable to obtain routine electrocardiography and measurements of orthostatic vital signs in patients presenting with anorexia nervosa. Echocardiography is generally not indicated unless prompted by clinical signs of disease. Admission to an inpatient unit with telemetry monitoring is recommended for patients with severe sinus bradycardia or junction rhythm, marked prolongation of the corrected QT interval, or syncope.


Subject(s)
Anorexia Nervosa/complications , Cardiovascular Diseases/etiology , Adolescent , Adult , Female , Humans , Male
11.
Ann Noninvasive Electrocardiol ; 21(1): 82-90, 2016 Jan.
Article in English | MEDLINE | ID: mdl-25944685

ABSTRACT

BACKGROUND: Electrocardiographic (ECG) safety evaluation is a required element of drug development. Performance characteristics of ECG measurement methodologies have rarely been studied prospectively. METHODS: We conducted a randomized, placebo-controlled, crossover study in 24 subjects to evaluate effects of moxifloxacin on the Fridericia rate-corrected QT (QTcF) interval. Five ECG replicates were obtained at 30 time points. Change from baseline QTcF (ΔQTcF) was fit by mixed-model analysis of variance to evaluate residual standard deviation. Precision was defined as intrasubject QTcF variance. Two core lab approaches were compared: QTinno, fully automated, 5 replicates and HeartSignals, computer-assisted manual, 3 replicates. Core lab values were then compared to an automated commercial algorithm (VERITAS). RESULTS: Twenty-three subjects provided 3450 ECGs potentially available for analysis. QTinno QTcF values were based upon 3419 ECGs, HeartSignals data on 2028 ECGs. Variance was similar between the QTinno and HeartSignals approaches (41.5 and 44 ms(2)). After excluding VERITAS QTcF measurements that deviated by >40 ms on visual review, variance in a set of 1907 common ECGs was lowest for HeartSignal, followed by QTinno and VERITAS (43.8, 52.6, 89.4 ms(2)) P = 0.02 HeartSignals versus QTinno, P < 0.0001 for both HeartSignals and QTinno versus VERITAS. CONCLUSIONS: A fully automated core lab approach using 5 replicates and a computer-assisted manual approach using 3 replicates were equally precise. When an identical number of ECGs were compared, the computer-assisted manual method was most precise, while the commercial algorithm was relatively imprecise. Although suitable for clinical assessment the standard commercial algorithm cannot be recommended for regulated safety research.


Subject(s)
Anti-Bacterial Agents/pharmacology , Electrocardiography/methods , Fluoroquinolones/pharmacology , Heart Conduction System/drug effects , Torsades de Pointes/chemically induced , Algorithms , Cross-Over Studies , Diagnosis, Computer-Assisted , Dose-Response Relationship, Drug , Female , Humans , Male , Moxifloxacin , Prospective Studies , Single-Blind Method
12.
Ann Noninvasive Electrocardiol ; 21(5): 443-9, 2016 Sep.
Article in English | MEDLINE | ID: mdl-26970562

ABSTRACT

BACKGROUND: Patients with hypertrophic cardiomyopathy (HCM) are at a fourfold to sixfold higher risk of developing atrial fibrillation (AF) compared to the general population, though incidence rates among patients undergoing alcohol septal ablation (ASA) are not well characterized. The purpose of this study was to evaluate atrial fibrillation incidence following ASA. METHODS: We studied 132 consecutive HCM patients without comorbid AF that underwent 154 ASA procedures. The incidence of AF in follow-up was assessed through chart abstraction including electrocardiography. Survival free of AF was estimated using Kaplan-Meier methodology. RESULTS: Over a mean follow-up of 3.6 ± 2.7 years (maximum 11.3 years), 10 (7.6%) patients developed new-onset AF. Of those who developed AF, both resting and provoked left ventricular outflow tract (LVOT) gradients had improved significantly (difference -79.78 mm Hg, P ≤ 0.005). Severity of mitral regurgitation improved in 7 (70%) patients. Survival free of AF was estimated to be 99.1%, 93.7%, and 91.7% at 1, 3, and 5 years. CONCLUSIONS: Despite relieving LVOT obstruction and improving mitral regurgitation severity via ASA, new-onset AF remained a common complication of hypertrophic cardiomyopathy.


Subject(s)
Ablation Techniques , Atrial Fibrillation/epidemiology , Cardiomyopathy, Hypertrophic/complications , Cardiomyopathy, Hypertrophic/surgery , Ethanol/therapeutic use , Heart Septum/surgery , Aged , Cardiomyopathy, Hypertrophic/physiopathology , Female , Humans , Incidence , Male , Middle Aged , Treatment Outcome
13.
J Interv Cardiol ; 28(1): 90-7, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25689552

ABSTRACT

OBJECTIVES: This study was designed to identify the incidence of late complete heart block (CHB) first identified at least 48 hours post alcohol septal ablation (ASA). BACKGROUND: Septal reduction with ASA is a therapeutic option for patients with symptomatic hypertrophic obstructive cardiomyopathy (HCM). CHB, resulting from the septal infarct, is a known complication with a reported incidence of 9-22%. The incidence of CHB more than 48 hours post-procedure is unknown. METHODS: Consecutive patients who underwent ASA were analyzed and clinical characteristics associated with late CHB were assessed. Late CHB was defined as first identification of CHB more than 48 hours after ASA. RESULTS: From 2002-2013, 145 subjects underwent 168 ASA procedures and were followed for a mean of 3.2 +/- 2.3 years. The incidence of late CHB was 8.9% (15/168 ASA procedures). Heart block occurred from 48 hours to 3-years post-procedure. In a multivariable model, patients with any CHB were more likely to have had multiple ASA procedures (OR 4.14; 95% CI: 1.24, 13.9; P < 0.05) and high resting and provoked left ventricular outflow tract (LVOT) gradient assessed by catheterization (OR per 10 mmHg gradient 1.14; 95% CI: 1.0, 1.20; P < 0.05). After multivariable adjustment, only a high provokable LVOT gradient remained an independent predictor of late CHB (OR per 10 mmHg gradient 1.14 [95% CI 1.02-1.29]). CONCLUSIONS: Late CHB is a common complication of ASA for treatment of symptomatic HCM. Post-discharge electrocardiographic surveillance for atrioventricular conduction disease should be considered after ASA, especially for those with a high provokable LVOT gradient.


Subject(s)
Ablation Techniques/adverse effects , Cardiomyopathy, Hypertrophic/surgery , Ethanol/therapeutic use , Heart Block/etiology , Heart Septum/surgery , Female , Follow-Up Studies , Humans , Incidence , Male , Middle Aged , Retreatment/statistics & numerical data , Ventricular Outflow Obstruction/complications
14.
J Negat Results Biomed ; 14: 21, 2015 Dec 02.
Article in English | MEDLINE | ID: mdl-26631058

ABSTRACT

BACKGROUND: Omega-3 fatty acids prevent cardiovascular disease (CVD) events in patients with myocardial infarction or heart failure. Benefits in patients without overt CVD have not been demonstrated, though most studies did not use treatment doses (3.36 g) of omega-3 fatty acids. Arterial stiffness measured by pulse wave velocity (PWV) predicts CVD events independent of standard risk factors. However, no therapy has been shown to reduce PWV in a blood pressure-independent manner. We assessed the effects of esterified omega-3 fatty acids on PWV and serum markers of inflammation among patients with hypertension. DESIGN AND METHODS: We performed a prospective, randomized; double-blinded pilot study of omega-3 fatty acids among 62 patients in an urban, safety net hospital. Patients received 3.36 g of omega-3 fatty acids vs. matched placebo daily for 3-months. The principal outcome measure was change in brachial-ankle PWV. Serum inflammatory markers associated with CVD risk were also assessed. RESULTS: The majority (71 %) were of Latino ethnicity. After 3-months, mean change in arterial PWV among omega-3 and placebo groups was -97 cm/s vs. -33 cm/s respectively (p = 0.36 for difference, after multivariate adjustment for baseline age, systolic blood pressure, and serum adiponectin). Non-significant reductions in lipoprotein-associated phospholipase A2 (LpPLA2) mass and high sensitivity C-reactive protein (hsCRP) relative to placebo were also observed (p = 0.08, and 0.21, respectively). CONCLUSION: High-dose omega-3 fatty acids did not reduce arterial PWV or markers of inflammation among patients within a Latino-predominant population with hypertension. CLINICAL TRIAL REGISTRATION: NCT00935766 , registered July 8 2009.


Subject(s)
Fatty Acids, Omega-3/administration & dosage , Hypertension/diet therapy , Hypertension/diagnosis , Vascular Stiffness , Aged , Double-Blind Method , Female , Humans , Male , Middle Aged , Pilot Projects , Prospective Studies , Treatment Outcome
15.
Health Promot Pract ; 16(4): 523-32, 2015 Jul.
Article in English | MEDLINE | ID: mdl-25586133

ABSTRACT

The Colorado Healthy Heart Solutions program uses community health workers to provide health promotion and navigation services for participants in medically underserved, predominantly rural areas who are at risk for developing cardiovascular disease. A text messaging program designed to increase participant engagement and adherence to lifestyle changes was pilot tested with English- and Spanish-speaking participants. Preimplementation focus groups with participants informed the development of text messages that were used in a 6-week pilot program. Postimplementation focus groups and interviews then evaluated the pilot program. Participants reported a preference for concise messages received once daily and for positive messages suggesting specific actions that could be feasibly accomplished within the course of the day. Participants also consistently reported the desire for clarity in message delivery and content, indicating that the source of the messages should be easy to recognize, messages should state clearly when participants were expected to respond to the messages, and any responses should be acknowledged. Links to other websites or resources were generally viewed as trustworthy and acceptable, but were preferred for supplementary material only. These results may inform the development of future chronic disease management programs in underserved areas or augment existing programs using text messaging reinforcement.


Subject(s)
Cardiovascular Diseases/prevention & control , Health Promotion/methods , Patient Acceptance of Health Care , Text Messaging/statistics & numerical data , Accelerometry , Adult , Aged , Colorado , Female , Focus Groups , Health Services Accessibility , Hispanic or Latino/psychology , Humans , Male , Medically Underserved Area , Middle Aged , Motor Activity , Patient Acceptance of Health Care/psychology , Patient Acceptance of Health Care/statistics & numerical data , Patient Compliance , Pilot Projects , Rural Health Services , Young Adult
16.
Ann Noninvasive Electrocardiol ; 19(4): 345-50, 2014 Jul.
Article in English | MEDLINE | ID: mdl-24533675

ABSTRACT

BACKGROUND: Premature ventricular complexes (PVCs) and ventricular tachycardia (VT) are associated with persistent symptoms and ventricular dysfunction. Approved medical therapies have undesirable side effects and proarrhythmic liability. Ranolazine is a novel antianginal that preferentially blocks the late sodium current. This current is enhanced among patients with cardiomyopathy; a promising target population for ranolazine. The utility of ranolazine, however, for ventricular arrhythmia suppression has not been well characterized. OBJECTIVES: We sought to determine the effectiveness of ranolazine for suppression of ventricular ectopy, particularly in the setting of ventricular dysfunction where enhanced efficacy might be expected. METHODS: We retrospectively evaluated eight patients (six with >10% PVC burden and two with incessant VT) treated with ranolazine. Arrhythmia frequency was evaluated by continuous monitoring before and after ranolazine initiation and the correlation between ventricular function and reduction in PVC burden was assessed. RESULTS: Among six patients with PVCs, ranolazine resulted in a median decrease in PVC burden of 60.2% (P = 0.06). In two cases of apparent PVC-induced cardiomyopathy, normalization of ventricular function was observed. A significant, inverse correlation between baseline ejection fraction and percentage reduction in PVCs was observed (rho = -0.89, P = 0.02). In two patients treated for incessant VT despite Class III antiarrhythmic therapy, ranolazine eliminated VT and prevented recurrent defibrillator therapy. CONCLUSIONS: Although not approved for this indication, ranolazine appears effective for symptomatic ventricular arrhythmias. The reduction in PVC burden was greatest among individuals with reduced ventricular function, perhaps due to enhanced late sodium current associated with cardiomyopathy. A confirmatory prospective trial seems warranted.


Subject(s)
Acetanilides/therapeutic use , Enzyme Inhibitors/therapeutic use , Piperazines/therapeutic use , Tachycardia, Ventricular/drug therapy , Ventricular Premature Complexes/drug therapy , Adult , Aged , Female , Humans , Male , Middle Aged , Ranolazine , Retrospective Studies , Tachycardia, Ventricular/physiopathology , Treatment Outcome , Ventricular Premature Complexes/physiopathology
17.
Am J Emerg Med ; 32(6): 493-7, 2014 Jun.
Article in English | MEDLINE | ID: mdl-24630604

ABSTRACT

OBJECTIVES: Rapid assessment of left ventricular ejection fraction (LVEF) may be critical among emergency department (ED) patients. This study examined the predictive relationship between ED physician performed bedside mitral-valve E-point septal separation (EPSS) measurements to the quantitative, calculated LVEF. We further evaluated the relationship between ED physician visual estimates of global cardiac function (GCF) and calculated LVEF values. METHODS: A prospective observational study was conducted on a sequential convenience sample of patients receiving comprehensive transthoracic echocardiography (TTE). Three ED ultrasound fellows performed bedside ultrasound examinations to obtain both EPSS measurements and subjective visual GCF estimates. A linear regression analysis was conducted to examine the relation of EPSS to the calculated LVEF from the comprehensive TTE. Agreement (modified Cohen κ) between ED ultrasound fellow GCF estimates and the calculated LVEF was also assessed. RESULTS: Linear regression analyses revealed a significant correlation (r=0.73, P<.001) between bedside EPSS and the calculated LVEF. The sensitivity and specificity of an EPSS measurement of greater than 7 mm for severe systolic dysfunction (LVEF≤30%) were 100.0% (95% confidence interval, 62.9-100.0) and 51.6% (95% confidence interval, 38.6-64.5), respectively. Subjective estimates of GCF were moderately correlated with calculated LVEF (Cohen κ=0.58). CONCLUSIONS: Measurements of EPSS by ED physicians were significantly associated with the calculated measurements of LVEF from comprehensive TTE. Subjective visual estimates of GCF, however, demonstrated only moderate agreement with the calculated LVEF. An EPSS measurement greater than 7 mm was uniformly sensitive at identifying patients with severely reduced LVEF.


Subject(s)
Emergency Service, Hospital , Point-of-Care Systems , Stroke Volume , Ventricular Function, Left , Echocardiography/methods , Female , Heart/physiopathology , Heart Septum/diagnostic imaging , Heart Septum/physiopathology , Humans , Male , Middle Aged , Mitral Valve/diagnostic imaging , Mitral Valve/physiopathology , Prospective Studies , Sensitivity and Specificity , Sex Factors , Stroke Volume/physiology , Ventricular Function, Left/physiology
18.
Ann Intern Med ; 158(10): 735-40, 2013 May 21.
Article in English | MEDLINE | ID: mdl-23689766

ABSTRACT

BACKGROUND: Long-acting opioids are a leading cause of accidental death in the United States, and methadone is associated with greater mortality rates. Whether this increase is related to the proarrhythmic properties of methadone is unclear. OBJECTIVE: To describe methadone-associated arrhythmia events reported in the U.S. Food and Drug Administration Adverse Event Reporting System (FAERS). DESIGN: Description of national adverse event registry data before and after publication of a 2002 report describing an association between methadone and arrhythmia. SETTING: FAERS, November 1997 and June 2011. PATIENTS: Adults with QTc prolongation or torsade de pointes and ventricular arrhythmia or cardiac arrest. MEASUREMENTS: FAERS reports before and after the 2002 report. RESULTS: 1646 cases of ventricular arrhythmia or cardiac arrest and 379 cases of QTc prolongation or torsade de pointes were associated with methadone. Monthly reports of QTc prolongation or torsade de pointes increased from a mean of 0.3 (95% CI, 0.1 to 0.5) before the 2002 publication to a mean of 3.5 (CI, 2.5 to 4.8) after it. After 2000, methadone was the second-most common primary suspect in cases of QTc prolongation or torsade de pointes after dofetilide (a known proarrhythmic drug) and was associated with disproportionate reporting similar to that of antiarrhythmic agents known to promote torsade de pointes. Antiretroviral drugs for HIV were the most common coadministered drugs. LIMITATION: Reports to FAERs are voluntary and selective, and incidence rates cannot be determined from spontaneously reported data. CONCLUSION: Since 2002, reports to FAERS of methadone-associated arrhythmia have increased substantially and are disproportionately represented relative to other events with the drug. Coadministration of methadone with antiretrovirals in patients with HIV may pose particular risk. PRIMARY FUNDING SOURCE: Colorado Clinical and Translational Sciences Institute, National Institutes of Health, and Agency for Healthcare Research and Quality.


Subject(s)
Long QT Syndrome/chemically induced , Methadone/adverse effects , Torsades de Pointes/chemically induced , Adult , Adverse Drug Reaction Reporting Systems , Anti-Retroviral Agents/therapeutic use , HIV Infections/drug therapy , Heart Arrest/chemically induced , Heart Arrest/epidemiology , Humans , Long QT Syndrome/epidemiology , Registries , Torsades de Pointes/epidemiology , United States/epidemiology , United States Food and Drug Administration
19.
COPD ; 11(5): 546-51, 2014 Sep.
Article in English | MEDLINE | ID: mdl-24831864

ABSTRACT

INTRODUCTION: Smoking is a major risk factor for both cardiovascular disease (CVD) and chronic obstructive pulmonary disease (COPD). More individuals with COPD die from CVD than respiratory causes and the risk of developing CVD appears to be independent of smoking burden. Although CVD is a common comorbid condition within COPD, the nature of its relationships to COPD affection status and severity, and functional status is not well understood. METHODS: The first 2,500 members of the COPDGene cohort were evaluated. Subjects were current and former smokers with a minimum 10 pack-year history of cigarette smoking. COPD was defined by spirometry as an FEV1/FVC < lower limit of normal (LLN) with further identification of severity by FEV1 percent of predicted (GOLD stages 2, 3, and 4) for the main analysis. The presence of physician-diagnosed self-reported CVD was determined from a medical history questionnaire administered by a trained staff member. RESULTS: A total of 384 (15%) had pre-existing CVD. Self-reported CVD was independently related to COPD (Odds Ratio = 1.61, 95% CI = 1.18-2.20, p = 0.01) after adjustment for covariates with CHF having the greatest association with COPD. Within subjects with COPD, pre-existing self-reported CVD placed subjects at greater risk of hospitalization due to exacerbation, higher BODE index, and greater St. George's questionnaire score. The presence of self-reported CVD was associated with a shorter six-minute walk distance in those with COPD (p < 0.05). CONCLUSIONS: Self-reported CVD was independently related to COPD with presence of both self-reported CVD and COPD associated with a markedly reduced functional status and reduced quality of life. Identification of CVD in those with COPD is an important consideration in determining functional status.


Subject(s)
Cardiovascular Diseases/epidemiology , Health Status , Pulmonary Disease, Chronic Obstructive/epidemiology , Quality of Life , Smoking/epidemiology , Aged , Cardiovascular Diseases/physiopathology , Case-Control Studies , Cohort Studies , Comorbidity , Exercise Test , Female , Forced Expiratory Volume , Hospitalization/statistics & numerical data , Humans , Hypercholesterolemia/epidemiology , Hypertension/epidemiology , Male , Middle Aged , Pulmonary Disease, Chronic Obstructive/physiopathology , Severity of Illness Index , Vital Capacity
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