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May 1983

Electrical Alternans: An Association With Coronary Artery Spasm

Author Affiliations

From the Division of Cardiology, Victory Memorial Hospital, Waukegan, Ill.

Arch Intern Med. 1983;143(5):1052-1053. doi:10.1001/archinte.1983.00350050218045

• A patient's condition was unique for having both QRS- and ST-segment alternans. The close association between ST-segment alternans and ischemic episodes is reproducible in an animal experimental study. Although such phenomena are usually associated with extensive myocardial disease, the postulated mechanism is far from perfected. It is more than likely that no single hypothesis will explain all types of phasic cardiac electrical phenomena.

(Arch Intern Med 1983;143:1052-1053)

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