Left ventricular wall motion abnormalities in patients with subarachnoid hemorrhage: Neurogenic stunned myocardium

Abstract

Objective. The purpose of this study was to determine whether a relation exists between electrocardiographic (ECG) abnormalities and left ventricular wall motion in patients with subarachnoid hemorrhage.Background. Although ECG change simulating acute myocardial infarction are frequently seen in patients with subarachnoid hemorrhage, their relation to left ventricular wall motion has not been established.Methods. Twelve patients with subarachnoid hemorrhage were classified according to the presence of ST segment elevation in at least two consecutive leads on admission: seven patients with ST segment elevation (group I) and five patients without ST segment elevation (group II). No patients had a previous history of heart disease. Left ventricular regional wall motion was evaluated by the centerline method. The mean (±SEM) duration from onset of subarachnoid hemorrhage to left ventriculography was 9 ± 3 h in group I and 10 ± 1 h in group II. Coronary angiography was performed to rule out wall motion abnormalities due to coronary artery disease while the ST segment was still elevated. Two dimensional echocardiography was used to evaluate wall motion thereafter.Results. All patients in group I showed ST segment elevation in ECG leads V4to V6. Wall motion of the left ventricular apex was significantly reduced in group I compared with group II (−2.48 ±0.41 vs. −0.45 ± 0.72, p < 0.02). No patients showed organic stenosis or vasospasm, or both, of epicardial coronary arteries. Wall motion abnormalities decreased echocardiographically in all patients, but one patient in group I died in hospital at 2 or 3 weeks after the onset of subarachnoid hemorrhage, when the T wave was inverted in leads V4to V6.Conclusions. These findings suggest that patients with subarachnoid hemorrhage and ST segment elevation may demonstrate transient corresponding regional wall motion abnormalities. The mechanism of neurogenic stunned myocardium was not clearly elucidated in the present study.