Repolarization of epicardial ventricular surface of rabbit heart in acute stenosis of the aortic arch.
Overload of the cardiac left ventricle causes opposite local changes in repolarization duration (activation-recovery intervals) on the right- and left-ventricular epicardium, which depend on the duration of overload. The activation-recovery intervals on the right-ventricular lateral surface decrease after 1-min overload, but increase after 10-min overload. The length of activation-recovery intervals on the lateral surface of the left-ventricular apex increases after 10-min aortic stenosis more markedly in comparison with that after 1-min overload. Decrease/increase of local lengths of activation-recovery intervals results in modification of the general sequence of cardiac ventricular surface repolarization.
Sedova
K A
KA
Laboratory of Cardiac Physiology, Institute of Physiology, Komi Research Center, Ural Division of Russian Academy of Sciences, Syktyvkar, Russia. ksenya_nastya@mail.ru
Vityazev
V A
VA
Azarov
J E
JE
Shmakov
D N
DN
D000818:Animals; D001013:Aorta, Thoracic / Q000503:physiopathology*; D021921:Aortic Stenosis, Supravalvular / Q000503:physiopathology*; D004566:Electrodes; D005260:Female; D008297:Male; D008564:Membrane Potentials; D011817:Rabbits; D016276:Ventricular Function / Q000502:physiology*