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Association Class I (association + class_i)

Distribution by Scientific Domains
Medical Sciences100%

Kinds of Association Class I

  • heart association class i
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  • new york heart association class i
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  • york heart association class i
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    Selected Abstracts

    Explantation of INCOR Left Ventricular Assist Device After Myocardial Recovery

    JOURNAL OF CARDIAC SURGERY, Issue 6 2008
    Ph.D., Takeshi Komoda M.D.
    We describe improved surgical techniques for INCOR LVAD explantation. Methods: The outcome of INCOR LVAD implantation at our center and the operative techniques of device explantation were studied. The patients weaned from the device were followed up. Results: Out of 121 patients supported by the device, five (4.1 %) were weaned from the device, whereas 34 patients (28.1 %) underwent heart transplantation. In explantation surgery, the inflow cannula was removed (one case) or remained in the left ventricle after occlusion with an inflow cannula plug, with transection of the inflow cannula at its curve (two cases) or without transection (two cases). When the inflow cannula was occluded without the support of cardiopulmonary bypass (two cases), operative time (180 min and 210 min) was shorter than that with other explantation procedures. After mean follow-up of 2.4 years (range two months,four years) after device explantation, all five patients are alive, have not required heart transplantation and are in New York Heart Association class I (one case) or class II (four cases). After weaning from the device, no cerebrovascular complication was observed in any of the five patients. Conclusions: There is a possibility of weaning after INCOR implantation and surgical techniques for the removal of the INCOR LVAD should be further developed. [source]

    The Effects of Rate-Adaptive Atrial Pacing Versus Ventricular Backup Pacing on Exercise Capacity in Patients with Left Ventricular Dysfunction

    PACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 1 2009
    M.S.C.E., ROD PASSMAN M.D.
    Background: Atrial rate-adaptive pacing may improve cardiopulmonary reserve in patients with left ventricular dysfunction. Methods: A randomized, blinded, single-crossover design enrolled dual-chamber implantable defibrillator recipients without pacing indications and an ejection fraction ,40% to undergo cardiopulmonary exercise treadmill stress testing in both atrial rate-adaptive pacing (AAIR) and ventricular demand pacing (VVI) pacing modes. The primary endpoint was change in peak oxygen consumption (VO2). Secondary endpoints were changes in anaerobic threshold, perceived exertion, exercise duration, and peak blood pressure. Results: Ten patients, nine males, eight with New York Heart Association class I, mean ejection fraction 24 ± 7%, were analyzed. Baseline VO2 was 3.6 ± 0.5 mL/kg/min. Heart rate at peak exercise was significantly higher during AAIR versus VVI pacing (142 ± 18 vs 130 ± 23 bpm; P = 0.05). However, there was no difference in peak VO2 (AAIR 23.7 ± 6.1 vs VVI 23.8 ± 6.3 mL/kg/min; P = 0.8), anaerobic threshold (AAIR 1.3 ± 0.3 vs VVI 1.2 ± 0.2 L/min; P = 0.11), rate of perceived exertion (AAIR 7.3 ± 1.5 vs VVI 7.8 ± 1.2; P = 0.46), exercise duration (AAIR 15 minutes, 46 seconds ± 2 minutes, 54 seconds vs VVI 16 minutes, 3 seconds ± 2 minutes, 48 seconds; P = 0.38), or peak systolic blood pressure (AAIR 155 ± 22 vs VVI 153 ± 21; P = 0.61) between the two pacing modes. Conclusion: In this study, AAIR pacing did not improve peak VO2, anaerobic threshold, rate of perceived exertion, or exercise duration compared to VVI backup pacing in patients with left ventricular dysfunction and no pacing indications. [source]

    Aortic Valve Surgery in Congenital Heart Disease: A Single-Center Experience

    ARTIFICIAL ORGANS, Issue 3 2010
    Kasim Oguz Coskun
    Abstract The optimal treatment of congenital aortic valve lesions is a controversial issue. This study was performed to evaluate the outcome after surgical treatment of aortic valve lesions in congenital aortic valve disease. Between the years of 2000 and 2008, 61 patients (mean age: 12.6 ± 9.6 years, range: 1 day to 40 years) underwent aortic valve surgery for congenital aortic valve disease. Twenty-four patients had undergone previous cardiovascular operations. Indications for surgery were aortic regurgitation in 14.7% (n = 9), aortic stenoses in 26.2% (n = 16), and mixed disease in 59.1% (n = 36). The Ross procedure was performed in 37.7% (n = 23), aortic valve replacement with biological or mechanical prostheses in 29.5% (n = 18). Concomitant procedures were performed in 91.8% (n = 56) due to associated congenital cardiac defects. The overall mortality rate was 5%. Six patients needed reoperation. Implantation of permanent pacemakers occurred in six patients for permanent atrioventricular block. At the latest clinical evaluation, all survivors are in New York Heart Association class I,II and are living normal lives. Aortic valve surgeries in patients with congenital heart disease have had low mortality and morbidity rates in our series. Surgical technique as well as timing should be tailored for each patient. Aortic valve replacement should be delayed until the implantation of an adult-sized prosthesis is possible. [source]

    Inflammatory Biomarkers are not Predictive of Intermediate-term Risk of Ventricular Tachyarrhythmias in Stable CHF Patients

    CLINICAL CARDIOLOGY, Issue 8 2007
    Yuval Konstantino M.D.
    Abstract Background: Elevated levels of inflammatory biomarkers and brain natriuretic peptide (BNP) are associated with increased mortality in patients with heart failure (HF). Hypothesis: The aim of the current study was to assess the correlation between circulating biomarkers and ventricular tachyarrhythmias among patients with HF. Methods: Blood samples from 50 stable ambulatory HF patients with moderate to severe systolic left ventricular (LV) dysfunction and an implantable cardioverter defibrillator (ICD) were analyzed for interleukin 6 (IL-6), tumor necrosis factor-alpha (TNF-,), high-sensitivity C-reactive protein (hsCRP) and BNP. Thereafter, the patients were followed for a mean period of 152 ± 44 days, during which ventricular tachyarrhythmias were recorded by the ICDs. Results: Follow-up data were obtained from 47 patients. Of them, 45 (96%) had ischemic cardiomyopathy, 38 (81%) had New York Heart Association class I,II, 43 (91%) were males, and the mean age was 68.6 ± 11.1 years. During follow-up, 5 patients (11%) had nonsustained ventricular tachycardia (NSVT), 6 patients (13%) had sustained ventricular tachycardia (VT) or ventricular fibrillation (VF) and 36 patients (76%) had no events. The circulating biomarkers' levels upon enrollment were not significantly different between patients who subsequently had NSVT or VT/VF and patients who were free of events. Conclusions: No correlation was found between plasma levels of IL-6, TNF-,, hsCRP and BNP and ventricular arrhythmic events among stable HF patients during an intermediate term follow-up of 5.1 months. Further studies are still required to assess the association between these biomarkers and long-term risk of ventricular tachyarrhythmia. Copyright © 2007 Wiley Periodicals, Inc. [source]