In order to assess the diagnostic value of the Q-K intervals as a measure of left ventricular performance, the present investigation was carried out on ischemic heart disease.
The systolic and the diastolic values of the Q-K intervals were designated as Q-Ks and Q-Kd respectively.
Although there was a significant relationship between the Q-K intervals and the systolic time intervals in ischemic heart disease, the correlation was more remarkable in Q-Kd than in Q-Kss. On the other hand, the negative correlation with the cardiac output was more obvious in Q-Ks than in Q-Kd.
The above results suggest that the measurement of the Q-K intervals is of great importance for noninvasive evaluation of the left ventricular performance.
