Table 2.

Regions of shortest and longest electromechanical delays in six canines during epicardial and endocardial pacing as well as during sinus rhythm. In two cases, the data were not available (N.A.).

		Dog #1	Dog #2	Dog #3	Dog #4	Dog #5	Dog #6
Epicardial lateral pacing	Shortest Longest	A-L P-S	P-L P-S	A-L P-S	P-L A-S	L S	L P-S
Epicardial anterior pacing	Shortest Longest	N.A.	A-L P-S	A P-L	A-L P-S	A P-L	A P-S
Endocardial pacing	Shortest Longest	P-S A	L A	P-L A-L	N.A.	A-L S	P S
Sinus rhythm	Shortest Longest	A-S P-L	S A	P-S A-L	S P	P-S L	S L

A: Anterior, P: Posterior, S: Septal, L: Lateral