Key result
Isometric handgrip exercise increases arterial blood pressure, cardiac output, and LV ejection time in paced patients.
Why the study?
The cardiovascular effects of isometric handgrip exercise in patients with artificial pacemakers were not well characterized.
Isometric handgrip may alter LV timing in paced patients; hypothesis-generating and leaves open any clinical or research role.
The cardiovascular effects of isometric handgrip exercise were determined with a nonivasive method in the patient with artificial pacemaker. The arterial blood pressure was measured with mercury manometer as well as cardiac output by the dye dilution method with Indocyanin green before and after handgrip exercise. Isometric handgrip exercise produced a significant increase in the left ventricular ejection time, the left ventricular ejection time/the preejection period, the ejection time index/the isometric contraction time, the arterial blood pressure and cardiac output and a significant decrease in the preejection time and the isometric contraction time. Cardiac output was increased more remarkably in the negative Master two step test group than in the positive Master two step test group. There was found a significant positive relationship between the increase in cardiac output and P wave rate upon handgrip exercise.
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Matsuura et al. (1977) studied Artificial cardiac pacemaker. Isometric handgrip exercise vs. Before exercise (baseline) was evaluated on Cardiovascular effects including left ventricular function, arterial blood pressure, and cardiac output. Isometric handgrip exercise in patients with artificial pacemakers produced significant increases in left ventricular ejection time, arterial blood pressure, and cardiac output.
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