Table 1.

Hemodynamic measurements before injection, at peak of injection, and after injection of polylysine-Gd-DTPA into left atria of dogs

Dog No.	Heart Rate, beats/min			LV Systolic Pressure, mmHg			Mean Intracoronary Pressure, mmHg
	Pre	Peak	Post	Pre	Peak	Post	Pre	Peak	Post
1	93	93	95	115	115	116	NA	NA	NA
2	94	92	96	103	103	103	88	88	87
3	144	144	142	123	124	123	79	79	78

Pre- and postinjection data are averages of 15 consecutive heartbeats. Peak data are averages of 5 beats. LV, left ventricular; DTPA, diethylenetriaminepentaacetic acid; NA, data not obtained.