The multicenter study of enhanced external counterpulsation (MUST-EECP): effect of EECP on exercise-induced myocardial ischemia and anginal episodes

J Am Coll Cardiol. 1999 Jun;33(7):1833-40. doi: 10.1016/s0735-1097(99)00140-0.

Abstract

Objectives: The purpose of this study was to assess safety and efficacy of enhanced external counterpulsation (EECP).

Background: Case series have shown that EECP can improve exercise tolerance, symptoms and myocardial perfusion in stable angina pectoris.

Methods: A multicenter, prospective, randomized, blinded, controlled trial was conducted in seven university hospitals in 139 outpatients with angina, documented coronary artery disease (CAD) and positive exercise treadmill test. Patients were given 35 h of active counterpulsation (active CP) or inactive counterpulsation (inactive CP) over a four- to seven-week period. Outcome measures were exercise duration and time to > or =1-mm ST-segment depression, average daily anginal attack count and nitroglycerin usage.

Results: Exercise duration increased in both groups, but the between-group difference was not significant (p > 0.3). Time to > or =1-mm ST-segment depression increased significantly from baseline in active CP compared with inactive CP (p = 0.01). More active-CP patients saw a decrease and fewer experienced an increase in angina episodes as compared with inactive-CP patients (p < 0.05). Nitroglycerin usage decreased in active CP but did not change in the inactive-CP group. The between-group difference was not significant (p > 0.7).

Conclusions: Enhanced external counterpulsation reduces angina and extends time to exercise-induced ischemia in patients with symptomatic CAD. Treatment was relatively well tolerated and free of limiting side effects in most patients.

Publication types

  • Clinical Trial
  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Angina Pectoris / diagnostic imaging
  • Angina Pectoris / physiopathology
  • Angina Pectoris / therapy*
  • Coronary Angiography
  • Counterpulsation / methods*
  • Double-Blind Method
  • Electrocardiography
  • Exercise Test
  • Exercise Tolerance / physiology
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Myocardial Ischemia / diagnostic imaging
  • Myocardial Ischemia / physiopathology
  • Myocardial Ischemia / therapy
  • Prospective Studies
  • Safety
  • Treatment Outcome