Cuomo S, Vigorito C, De Caprio L, Maione S, Giunta A, Serino C, Romano M, Rengo F
G Ital Cardiol. 1981;11(7):903-7.
Exercise-induced changes of R wave amplitude (delta R) during exercise has been employed to improve the reliability of stress testing in detecting patients with coronary artery disease. Several authors postulated that delta R are related to changes of ventricular volumes. Furthermore Valsalva Maneuver (VM) is able to induce a decrease of left ventricular volumes induced by VM and the variations of R wave. Echocardiographic method was used to determine left ventricular volumes and R wave amplitude changes were evaluated by Frank's lead. Our findings suggest that R wave amplitude changes are not related to variations of cardiac volume. Electrophysiological mechanisms of delta R need further investigation.
运动期间运动诱发的R波振幅变化（ΔR）已被用于提高压力测试在检测冠心病患者方面的可靠性。几位作者推测ΔR与心室容积的变化有关。此外，瓦尔萨尔瓦动作（VM）能够诱发由VM引起的左心室容积减小以及R波的变化。采用超声心动图方法测定左心室容积，并通过弗兰克导联评估R波振幅变化。我们的研究结果表明，R波振幅变化与心脏容积的变化无关。ΔR的电生理机制需要进一步研究。
