Differences in treadmill exercise tolerance parameters between patients with partial and advanced interatrial depolarization abnormality.

Advanced interatrial block (aIAB) is considerably much less common than partial interatrial block (pIAB), occuring in <2% of the elderly hospitalized population. Less is, therefore, known of the true clinical burden of aIAB, particularly in relation to graded exercise. Therefore, 12 patients with aIAB and 30 patients with pIAB who performed a baseline exercise tolerance test and had a repeat test performed > or = 2 years later were included in the study.

Prospective assessment of cardiovascular events in patients with partial and advanced interatrial conduction delay: a preliminary observation.

Introduction: Major adverse cardiovascular events (MACE) have been investigated with partial interatrial block (IAB; P wave > or = 110 ms) but not with advanced IAB.

Methods: Twenty-four advanced IAB and 34 partial IAB patients were followed for 24 months for MACE, change in renal function and death.

Results: Three patients with advanced IAB had myocardial infarction compared to none with partial IAB (p = 0.

Differences in echocardiographic indices between patients with partial and advanced interatrial conduction delay.

Partial interatrial block (IAB) (P wave > or =110 ms) is a marker of left atrial abnormality. A similar association among patients with advanced IAB (biphasic P waves > or =110 ms in leads II, III, and aVF) is unknown. The authors screened 27 consecutive patients for advanced IAB with transthoracic echocardiograms (TTEs).

Association of atrial fibrillation in patients with interatrial block over prospectively followed controls with comparable echocardiographic parameters.

Interatrial block (IAB) (P wave >or=110 ms) is a potential risk of atrial fibrillation (AF). However, few investigations have assessed the relevance of echocardiographic parameters, particularly the contribution of its known correlate, left atrial enlargement in this regard. We identified 32 consecutive patients with comparable echocardiographic parameters, such as left atrial dimension and left ventricular ejection fraction.

Angiographic localization of potential culprit coronary arteries in patients with interatrial block following a positive exercise tolerance test.

Interatrial block (IAB), denoted by P waves > or =110 ms, is believed to be associated with underlying ischemia, particularly with that of its principal interatrial conduction pathway, the Bachmann bundle. We investigated if there is an angiographic association of IAB on electrocardiograms at rest in patients who underwent cardiac angiography after a positive exercise tolerance test (ETT) result. Twenty-seven patients with IAB and 42 control patients without IAB on electrocardiograms at rest who had evidence of ischemia on cardiac angiography after ETT were identified.

Limited utility of interatrial block in predicting ischemia on coronary angiography in patients with suboptimal exercise performance.

Introduction: Interatrial block (P waves > or = 110 ms) is thought to be associated with underlying myocardial ischemia during exercise but has not been extensively investigated in patients with suboptimal or borderline exercise tolerance tests (< 3 min exercise). We utilized coronary angiography to assess the relationship of both, the resting baseline and exercise induced increase in P-wave duration with coronary artery disease among patients who had undergone such tests.

Methods: We prospectively identified 51 consecutive patients with interatrial block who had coronary artery disease and hypertension but not atrioventricular valvular heart disease, and had undergone coronary angiography to evaluate myocardial ischemia after a suboptimal exercise tolerance test.

Prospective evaluation of atrial tachyarrhythmias in patients with interatrial block.

Introduction: Interatrial block (P-wave> or =110 ms) is clinically associated with left atrial enlargement and electromechanical dysfunction as well as atrial tachyarrhythmias. We prospectively evaluated the incidence of such arrhythmias, especially atrial fibrillation among patients with interatrial block over the course of 1 year.

Methods: 118 patients (aged 48 to 104 years; female 56.