n the electrocardiogram illustrated here (Figure), the ventricular rhythm is irregularly irregular with baseline undulation but no definite P waves; thus, the rhythm is atrial fibrillation. No time lines are visible on the tracing, but it was recorded at 25 mm per second and is 250 mm, or 10 seconds, long. Nineteen QRSs occur in the 10 seconds, making the ventricular rate 114 beats per minute. ...

Right ventricular cavity electrocardiograms were obtained in six subjects having qR patterns in V leads made from precordial sites overlying the hypertrophied right ventricle. Four of the six, unlike control subjects, had no initial R wave in the right ventricular cavity; one had only a questionable initial R wave. Simultaneous intracavity and precordial electrocardiograms suggested that the in...

O VER 50 years ago, Waller pointed out the obvious correlation between anatomic and electrical phenomena, the mirror image electrocardiogram in situs inversus.' Shortly thereafter, Einthoven described other correlations between the position of the heart and the mean electrical axis in normal human subjects.2 These correlations were extended to hypertrophied hearts by Groedel and Monckeberg in 1...

AIMS Arrhythmic storm or repetitive ventricular arrhythmia (VA) has been occasionally observed in Brugada syndrome (BS). A beta-adrenergic stimulator [isoproterenol (ISP)] has been reported to suppress this arrhythmic storm in sporadic cases. Accordingly, we investigated the antiarrhythmic effects of ISP infusion in consecutive BS patients with arrhythmic storm or repetitive VA. METHODS AND R...

Case. A 64-year-old Caucasian woman was brought to the emergency department with severe dysphagia and left chest pain for last 4 days. Initial evaluation revealed elevated ST segment in precordial leads on EKG with elevated cardiac enzymes. Limited echocardiogram showed infra-apical wall hypokinesia. Cardiac angiography was done subsequently which showed nonflow limiting mild coronary artery di...

BACKGROUND Ventricular fibrillation (VF) and sudden death (SD) may occur in patients with ST-segment elevation in the right precordial leads. The mechanism of such events is unclear, so the aim of the present study was to assess whether there is an underlying morphological or pathological abnormality in these patients. METHODS AND RESULTS Fourteen consecutive patients (44+/-10 years old, all ...

To investigate the electrocardiographic and hemodynamic changes in isolated right ventricular infarction, 0.25 ml or 0.5 ml of metallic mercury was injected into the right coronary artery of 14 closedchest dogs. At autopsy, at least 60% of the right ventricle was necrotic in every dog. Heniodynamic observations were made in 11 and electrocardiographic mapping was performed in all 14 dogs. Right...