Table 1 The action potential parameters of the pulmonary veins before and after the stretch.

Tension (mg)	0	100	300	p Value
APA (mV)	110 (10)	101 (9)*	86 (7)*†	<0.005
APD50 (ms)	63 (9)	58 (8)*	47 (11)*†	<0.005
APD90 (ms)	137 (16)	129 (15)*	110 (14)*†	<0.005
MDP (‐mV)	70 (5)	72 (6)*	81 (6)*†	<0.005
Incidence of EADs (%)	2/23 (9%)	6/23 (26%)	14/23 (61%)*†	<0.005
Incidence of DADs (%)	0/23 (0%)	1/23 (4%)	7/23 (30%)*†	<0.005

APA, amplitudes of the action potential; APD, action potential duration; APD₅₀, action potential at a repolarisation of 50%; APD₉₀, action potential at a repolarisation of 90%; DADs, delayed after‐repolarisation; EADs, early after‐repolarisation; MDP, membranous diastolic potential.

Action potentials of the pulmonary veins (n = 23) elicited by electrical stimuli (2 Hz), *p<0.05 versus tension = 0; †p<0.05 versus tension = 100 mg.