This retrospective study correlates electrocardiographic and histopathologic findings in 24 patients with single well-circumscribed infarcts to determine 1) whether ECG terms commonly used to describe the location of myocardial infarcts are significant, and 2) whether the extent of infarct can be determined using QRS characteristics. Transverse sections of the hearts were photographed. Based on...

A definite diagnosis of anterior myocardial infarction is often difficult to make in patients when a pattern of poor R wave progression in the precordial leads is present on the electrocardiogram. The purpose of this study was to determine whether a mathematical model could be devised to identify patients with anterior infarction among 102 consecutive patients with poor R wave progression. Each...

BACKGROUND Ventricular fibrillation (VF) has been proposed to be maintained by localized high-frequency sources. We tested whether spectral-phase analysis of the precordial ECG enabled identification of periodic activation patterns generated by such sources. METHODS AND RESULTS Precordial ECGs were recorded from 15 ischemic cardiomyopathy and 15 Brugada syndrome (type 1 ECG) patients during i...

Objectives. The aim of the study was to compare randomly assigned primary angioplasty and accelerated recombinant tissue plasminogen activator (rt-PA), in patients with “high-risk” inferior acute myocardial infarction (ST-segment elevation in the inferior leads and ST-segment depression in the precordial leads). Background. The ST-segment depression in the precordial leads is a marker of severe...

Apical hypertrophic cardiomyopathy is a recently recognised entity, with typical electrocardiographic, echocardiographic and myocardial scintigraphic features. Thallium imaging is more sensitive than echocardiography, but electrocardiogram appears to be an important clue to its diagnosis which shows changes in the mid precordial leads in most of the patients.

Introduction: Ablation of Atrial Fibrillation (AF) can induce several types of Atrial Tachycardias (ATs). Perimitral reentry is a common mechanism among postablation ATs. The electrocardiographic (ECG) criteria for differentiating perimitral reentry from other postablation ATs may be useful in clinical practice. Methods and results: A total of 48 consecutive post atrial fibrillation ablation pa...

Attention to the U wave is practically nonexistent among clinical electrocardiographers. Nevertheless, this wave exists, is most frequently found in the precordial leads and less often in the limb leads. Characteristically, when the U wave is present, its direction is generally the same as that of the T wave which it follows. Its greatest amplitude seems to be found in V2-V4 or 5, and then it d...

In electrocardiograms of normal human hearts recorded by precordial leads the initial ventricular complex shows a fairly constant configuration. With the right arm electrode placed at the apical region and the second electrode at any point distant from the heart the primary ventricular deflection consists of a conspicuous downward deflection followed by an upward deflection. The initial downwar...

Design and patients The study population consisted of 20 children in convalescent phase of KD and 20 age and sex matched healthy controls. All children with KD had received intravenous immunoglobulin (IVIG) during the acute phase and only 1 had mild coronary artery involvement which had normalized during follow up. Intervals were measured with the use of a digital caliper (least count 0.01 mm) ...