Scher H, Hartman L M, Furedy J J, Heslegrave R J
Psychosom Med. 1986 Mar-Apr;48(3-4):159-66. doi: 10.1097/00006842-198603000-00001.
Phasic changes in heart rate (HR) and electrocardiographic T-wave amplitude (TWA) were monitored in healthy Type A (coronary-prone) and Type B (non-coronary-prone) men during the performance of a difficult arithmetic task. Type As showed significantly greater reductions in TWA as compared to Type Bs, though no group differences were present in HR change. This pattern of results, wherein a significant Type A-B difference was observed in a phasic measure of ventricular performance (TWA), but not in one of supraventricular performance (HR), suggests that Type As experience excessive neurally mediated sympathetic stimulation of the myocardium during mental work.
在健康的 A 型（易患冠心病）和 B 型（不易患冠心病）男性执行一项困难的算术任务期间，监测了心率（HR）和心电图 T 波振幅（TWA）的阶段性变化。与 B 型相比，A 型的 TWA 显著降低，尽管两组在心率变化方面没有差异。这种结果模式，即在心室功能的阶段性测量（TWA）中观察到 A 型和 B 型之间存在显著差异，但在室上性功能（HR）的测量中却没有，表明 A 型在脑力劳动期间经历了过度的神经介导的心肌交感神经刺激。
