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Chest, Vol 101, 1060-1064, Copyright © 1992 by American College of Chest Physicians

ARTICLES

Diastolic time and left ventricular performance during one- and two- handed weight holding

M Matsutani, T Sugiura, K Takehana, T Iwasaka and M Inada
Second Department of Internal Medicine, Kansai Medical University, Osaka, Japan.

To evaluate the difference in DT and systolic time intervals during one- handed and two-handed weight holding with the same total load, the DT- heart rate relationship was studied in 12 patients and ten normal volunteers. Heart rate, blood pressure, and pressure-rate product were significantly higher in one-handed compared with two-handed weight- holding exercise in patients with MI. Although there were no significant differences in QS2 and DT between the two types of weight- holding exercise in normal volunteers, QS2 was significantly longer and DT was significantly shorter in one-handed compared with two-handed weight-holding exercise in patients with MI. Disproportionate shortening of DT with higher pressure-rate product during one-handed compared with two-handed weight-holding exercise can initiate an imbalance of myocardial oxygen supply and demand in patients with MI.




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Copyright © 1992 by the American College of Chest Physicians.