A pacemaker is an electric medical device that’s generally about the size of a matchbox. A surgeon implants it under your skin to help manage irregular heartbeats called arrhythmias. Pacemakers can ...
A meta‑analysis of the 20 crossover studies showed a statistically significant improvement in exercise capacity with dual‑chamber pacemakers compared with single‑chamber ventricular pacemakers ...
In the normal heart, the heart's lower chambers (ventricles) pump in sync with the heart's upper chambers (atria). When a person has heart failure, often the right and left ventricles do not pump ...
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