Format

Send to

Choose Destination
J Am Coll Cardiol. 1997 Oct;30(4):942-6.

Cardiac release and kinetics of endothelin after severe short-lasting myocardial ischemia.

Author information

1
Department of Cardiology, University Hospital Lübeck, Germany.

Abstract

OBJECTIVES:

The aim of this study was to investigate the release kinetics of endothelin after induced short-lasting myocardial ischemia.

BACKGROUND:

Endothelin is an endothelium-derived vasoactive peptide. Unequivocal proof of its cardiac release in ischemic syndromes has not yet been demonstrated.

METHODS:

A coronary sinus study with atrial pacing was performed in 23 patients with coronary artery disease. Endothelin (ET), cardiac troponin-T (TnT), myoglobin (Mb) and creatine kinase (CK) samples were withdrawn from the coronary sinus and a peripheral vein before and 1, 5, 10, 30 and 45 min and 1, 2, 3 and 6 h after pacing. The appearance of angina pectoris, abnormal cardiac lactate metabolism and ST segment depression were further criteria for myocardial ischemia.

RESULTS:

In the study group, pacing stress induced severe ischemia (mean duration +/- SD 6.1 +/- 1.2 min), with a maximum of 0.34 +/- 0.12-mV ST segment depression in 21 of 23 patients and angina pectoris in 22 of 23. The maximal cardiac lactate production was 42.8 +/- 17.3% (p < 0.03). TnT and CK levels in the total group were normal; in 14 of 23 patients a transient elevation of Mb with a maximum after 3 h was detected (86.4 +/- 27.1 micrograms/liter, p < 0.03). The ET concentrations increased significantly (p < 0.001) in the coronary sinus (from 4.6 +/- 0.8 [baseline] to 12.9 +/- 2.7 pg/ml at 1 min after cessation of pacing) and the peripheral vein, respectively (from 4.7 +/- 0.7 [baseline] to 8.3 +/- 2.1 pg/ml at 1 min). ET further remained elevated for 1 h with persisting higher coronary sinus than peripheral venous concentrations, indicating cardiac ET release. In a control group of 18 patients without heart disease, all variables were unchanged.

CONCLUSIONS:

Short-lasting severe myocardial ischemia was associated with significant ET release of cardiac origin that lasted up to 1 h.

PMID:
9316522
DOI:
10.1016/s0735-1097(97)00241-6
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center