Does precordial scintillation correlate with coronary sinus sampling for measuring myocardial blood flow using krypton 85 in human subjects?
Precordial scintillation of krypton 85 provides a highly correlated alternative to coronary sinus sampling for assessing myocardial blood flow.
Myocardial blood flow in human subjects was assessed by comparative simultaneous measurement of krypton 85 radioactive decay from coronary sinus and precordial scintillation. Empirical correction of postclearance background from precordial curves yielded a high degree of correlation between flows derived from the two sampling sites (r = .889, P < .001). Comparison of left and right coronary flows in nine subjects revealed similarity in flow through the two vessels over a wide range of actual flow values (r = .945, P < .001).
Klein et al. (Fri,) studied this question.