منابع مشابه
Initial Ventricular Impulse. a Potential Key to Cardiac Evaluation.
PHYSICIANS are frequently obliged to evaluate the status of the heart in patients with various types and degrees of cardiac malfunction or disease. Clinical criteria for this evaluation have been largely subjective. For example, the cardiac reserve capacity is most commonly judged by the level of exer-tion that patients can accomplish without symptoms. In research laboratories, functional capac...
متن کاملChanges of ventricular impulse formation during carotid pressure in man.
THERE appears to be general agreement that in the mammalian heart vagal stimulation has no effect on ventricular contractility. This was demonstrated by Drury2 who used the myocardiograph of Cushny and was confirmed by optical determination of the intraventricular pressure of the artificially driven heart; when a cardiac alternans existed and weak faradic stimulation of the cardiac sympathetic ...
متن کامل[Ventricular tachycardia as initial presentation of pheochromocytoma].
Pheochromocytoma presents with headache, sweating, and palpitations associated with hypertension, heart failure, and arrhythmias due to catecholamine secretion.1 The presence of sustained ventricular tachycardia (VT) has been reported rarely.2,3 We describe a case of pheochromocytoma that manifested as sustained and incessant monomorphic VT. A 47-year-old woman with diabetes and hypertension un...
متن کامل[Malignant ventricular arrhythmias as the initial manifestation of hyperthyroidism].
Ventricular arrhythmia is normally secondary to organic heart disease or ion disorders. On rare occasions, it may also be caused by extracardiac diseases, such as hyperthyroidism. We describe a 46-year-old woman who consulted for dyspnea, cough, and edema that had lasted three weeks. She reported no other symptoms and had not lost weight. Soon after her arrival, she presented cardiorespiratory ...
متن کاملInitial ventricular activation in left-sided intraventricular conduction defects.
Nine patients with ECG evidence of rate-related left bundle branch block (LBBB) were studied using His bundle electrograms, electrograms from the right ventricular (RV) apex and vectorcardiograms recorded as heart rate was increased to produce LBBB. In five patients, when LBBB occurred, initially normal septal activation reversed and the HV intervals increased 10-30 msec, while the H-RVA interv...
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ژورنال
عنوان ژورنال: Circulation
سال: 1964
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.29.2.268