Oct 16, 1999

Mechanisms and clinical significance of transient atrioventricular block during dobutamine stress echocardiography

Journal of the American College of Cardiology
K C HungD Wu

Abstract

The purpose of this study was to investigate the possible mechanism and the clinical significance of transient atrioventricular block (AVB) during dobutamine stress echocardiography (DSE). Transient AVB occurs rarely during DSE; however, the mechanisms responsible for blocks are unclear. A retrospective analysis of clinical, echocardiographic, catheterization, revascularization and head-up tilting test data was conducted in patients who developed transient AVB during DSE. A total of 302 patients with known or suspected coronary artery disease (CAD) underwent DSE before coronary angiography between November 1997 and August 1998. Transient AVB developed in 12 patients during the test. Mobitz I block was noted in six patients and Mobitz II block in the other six patients. Nine of these 12 patients were subsequently shown to have CAD and three had no significant coronary artery stenosis. Mobitz II block was observed only in patients with CAD, while Mobitz I block occurred in three patients with and three patients without CAD (p < 0.05). Eight of the nine patients with CAD underwent a successful coronary angioplasty with or without stenting and a repeat DSE revealed no recurrence of heart block except in one patient. Head-up tilting...Continue Reading

  • References8
  • Citations24

References

  • References8
  • Citations24

Citations

Mentioned in this Paper

Heart Block
Coronary Artery Disease
Stent, Device
Recurrent Malignant Neoplasm
Myocardial Ischemia
Cardiopulmonary Exercise Test
Coronary Arteriosclerosis
Atrioventricular Block
2D Echocardiography
Recurrence (Disease Attribute)

About this Paper

Related Feeds

Cardiology Journals

Discover the latest cardiology research in this collection of the top cardiology journals.