Key result
Myopotentials from pectoral muscle contraction can inhibit demand pacemakers, causing cerebral ischemia in 4 cases and demonstrating vulnerability in 24% of a tested patient sample.
Why the study?
Does isometric contraction of the pectoralis major cause inhibition of demand pacemakers in patients with these devices?
Population
Patients with demand pacemakers
Design
Case_series
Authors
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Myopotential inhibition may underlie syncope in pacemaker patients; hypothesis-generating for prevalence and programming adjustments in prospective cohorts.
Observational
Does isometric contraction of the pectoralis major cause inhibition of demand pacemakers in patients with these devices?
Myopotentials from pectoral muscle contraction can inhibit demand pacemakers, potentially leading to cerebral ischemic episodes.
David Mymin (1973) conducted an observational in Patients with demand pacemakers. Skeletal muscle potentials (myopotentials) was evaluated on Vulnerability to pacemaker inhibition by pectoral muscle contraction on routine electrocardiographic testing. Myopotentials from pectoral muscle contraction can inhibit demand pacemakers, causing cerebral ischemia in 4 cases and demonstrating vulnerability in 24% of a tested patient sample.
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