Mechanisms of Arrhythmogenicity in Hypertrophic Cardiomyopathy: Insight From Non-invasive Electrocardiographic Imaging

Electrocardiographic Significance of Reversible Thallium-201 Abnormalities in Hypertrophic Cardiomyopathy

Background. Exercise-induced abnormalities during thallium-201 scintigraphy that normalize at rest frequently occur in patients with hypertrophic cardiomyopathy. However, it is not known whether these abnormalities are indicative of myocardial ischemia. Methods and Results. Fifty patients with hypertrophic cardiomyopathy underwent exercise 20UT1 scintigraphy and, during the same week, measureme...

Mechanisms of Myocardial Ischemia in Hypertrophic Cardiomyopathy

BACKGROUND Angina is common in hypertrophic cardiomyopathy (HCM) and is associated with abnormal myocardial perfusion. Wave intensity analysis improves the understanding of the mechanics of myocardial ischemia. OBJECTIVES Wave intensity analysis was used to describe the mechanisms underlying perfusion abnormalities in patients with HCM. METHODS Simultaneous pressure and flow were measured i...

Electrocardiographic changes after alcohol septal ablation in hypertrophic obstructive cardiomyopathy.

OBJECTIVE To report acute and mid-term electrocardiographic changes in patients with hypertrophic obstructive cardiomyopathy (HOCM) after alcohol ablation of the first large septal branch of the left anterior descending coronary artery; and to relate electrocardiographic data with the left ventricular outflow tract pressure gradients. PATIENTS Nine consecutive symptomatic patients with HOCM (...

Electrocardiographic findings in patients with obstructive and nonobstructive hypertrophic cardiomyopathy.

One hundred and thiry-four patients with hypertrophic cardiomyopathy were evaluated by standard 12-lead electrocardiography. Normal electrocardiograms were extremely uncommon, occurring in less than 7% of each subgroup of patients (i.e., those with or without either symptoms or obstruction to left ventricular outflow), with the exception of those who were both asymptomatic and had no left ventr...

Simple electrocardiographic parameters predicting risk of hypertrophic cardiomyopathy: Too simple?