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Table 2 Impact of chronic androgen treatment and GDX on resting and action potentials

From: Testosterone modulates cardiac contraction and calcium homeostasis: cellular and molecular mechanisms

a Component Treatment Duration (weeks) Preparation Functional change Species Reference
Testosterone supplementation
RMP bTestosterone 4 Ventricular muscle Rat [84]
cDihydrotestosterone 13 Ventricular myocyte Mouse [39]
AP amplitude bTestosterone 4 Ventricular muscle Rat [84]
APD50 bTestosterone 4 Ventricular muscle Rat [84]
cDihydrotestosterone 13 Ventricular myocyte Mouse [39]
APD90/95 bTestosterone 4 Ventricular muscle Rat [84]
cDihydrotestosterone 13 Ventricular myocyte Mouse [39]
Gonadectomy (GDX)
RMP GDX 4 Ventricular muscle Rat [84]
11–15 Ventricular myocyte Mouse [39]
AP amplitude GDX 4 Ventricular muscle Rat [84]
APD50 GDX 4 Ventricular muscle Rat [84]
11–15 Ventricular myocyte Mouse [39]
APD90/95 GDX 4 Ventricular muscle Rat [84]
11–15 Ventricular myocyte Mouse [39]
  1. aAll experiments used paced tissues and myocytes from male animals only. bTestosterone treatment with 5 mg/kg/day. cDihydrotestosterone treatment with a 7.5-mg pellet.