Diastolic time and left ventricular performance during one- and two-handed weight holding.
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.
Matsutani
M
M
Second Department of Internal Medicine, Kansai Medical University, Osaka, Japan.
Sugiura
T
T
Takehana
K
K
Iwasaka
T
T
Inada
M
M
D000704:Analysis of Variance; D003971:Diastole / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D016018:Least-Squares Analysis; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology / Q000503:physiopathology; D011187:Posture / Q000502:physiology; D012044:Regression Analysis; D013599:Systole / Q000502:physiology; D013997:Time Factors; D016277:Ventricular Function, Left / Q000502:physiology*