Cardiol J
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Case Reports
T wave oversensing and low percentage of biventricular pacing in cardiac resynchronization therapy.
The success of cardiac resynchronization therapy (CRT) depends on a high percentage of ventricular pacing. We present the electrocardiography and electrograms of a patient who underwent an implantable cardioverter-defibrillator (ICD) with CRT implantation showing a low percentage of ventricular pacing as a result of T wave oversensing of paced QRS. The patient showed no clinical improvement. We suggest finding a good sensitivity of F waves in induced ventricular fibrillation during ICD implantation in order to overcome the harm of possible oversensing.
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Bicuspid aortic valve is one of the most common congenital cardiac anomalies and it may be accompanied by other cardiovascular anomalies. Sinus of Valsalva aneurysm is a rare anomaly in adult population, but it coexists with bicuspid aortic valve quite often. This report describes a 57 years-old patient who had a bicuspid aortic valve accompanied by unruptured Valsalva sinus aneurysm with significant left anterior narrowing and who underwent successful surgery with ascending aorta and aortic valve replacement as well as coronary by-pass grafting.
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Adult patients with congenital heart disease (CHD) usually find their exercise capacity satisfactory. However, objective evaluation is important for diagnostic and prognostic purposes. The aim of this study was to evaluate exercise capacity using cardiopulmonary exercise tests and measurement of serum B-type natriuretic peptide (BNP) levels in adult patients with CHDs, both in the entire study cohort and in subjects with individual types of cardiac lesions, as well as to verify the relation between BNP level and cardiac performance. ⋯ The exercise capacity of patients with CHD is, in general, compromised, most strikingly in patients suffering from pulmonary hypertension and cyanosis. Serum BNP levels in these subjects are increased and correlate well with exercise capacity. BNP level is higher in patients with cyanotic CHDs.
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The aim of this study was to assess the effect of left ventricular dysfunction on right ventricular ejection fraction during exercise in heart failure patients and its implications in functional capacity and blood pressure response. ⋯ Biventricular systolic dysfunction during exercise is associated with higher rest and stress blood pressure and worse functional capacity.
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Wellens' syndrome is a pattern of electrocardiography T-wave changes associated with critical proximal left anterior descending artery lesion. Patients with Wellens' syndrome are at high risk of the development of extensive myocardial infarction of the anterior wall and death. Thus, it is vital that this finding is recognized promptly. We present a patient with Wellens' syndrome in this article.