Most people in their 70s or older seem to have it. ![]() Tachycardia-bradycardia syndrome. The heartbeats are spaced out widely and alternate between rhythms that are unusually slow and fast.Īt any age, sick sinus syndrome can develop.Chronotropic incompetence. At rest, the heart rate is within normal limits, but it doesn’t rise as high as it should with physical activity.Sinoatrial exit block. Pauses or skipped beats result from slower or obstructed signals to the upper heart chambers.Sinus arrest. Beats are skipped as a result of a pause in sinus node’s signals.Sinus bradycardia. A slow heartbeat that is produced by the sinus node.Sick sinus syndrome has the following characteristics: Having muscular dystrophy which is a neuromuscular disease.Medications to treat irregular heartbeats (arrhythmias). ![]()
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