1.
Biull Eksp Biol Med
; 100(9): 305-8, 1985 Sep.
Article
in Russian
| MEDLINE
| ID: mdl-3876118
ABSTRACT
An isolated frog heart placed in a special chamber with Ringer solution (pH 7.2) was stimulated by electric field at a frequency of 0.3-4.0 Hz with graphite electrodes immersed in the solution. Unusual resonance phenomena were observed during a progressive increase or decrease of the stimulation frequency: the amplitude of the mechanical responses of the preparation rose at multiple frequencies of stimulation, whereas the frequency of the responses remained unchanged.
Subject(s)
Heart/physiology , Animals , Electric Stimulation , Electromagnetic Fields , In Vitro Techniques , Myocardial Contraction , Rana temporaria
2.
Med Radiol (Mosk)
; 14(4): 58-62, 1969 Apr.
Article
in Russian
| MEDLINE
| ID: mdl-4984631