Sick sinus syndrome
MONDO:0001823A constellation of signs and symptoms which may include syncope, fatigue, dizziness, and alternating periods of bradycardia and atrial tachycardia, which is caused by sinoatrial node dysfunction.
Also known as: SSS
25 clinical trials for this condition and its sub-types.
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Broader categories
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Tiny Pacemaker's position may change how heart beats
Knowledge-focused OngoingThis study watches 40 adults who need a leadless pacemaker to see if where the device sits inside the heart changes heart rhythm or pumping strength. Researchers will use CT scans and ECGs to check heart function and valve leakage. The goal is to find the best spot for the pacema…
Sponsor: Medtronic Cardiac Rhythm and Heart Failure • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:28 UTC
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Ear zaps may tweak heart rhythms, tiny study hints
Knowledge-focused OngoingThis small pilot study is testing whether a gentle, non-invasive electrical stimulation on the ear (auricular vagus nerve stimulation) can change how the heart's electrical system works. Ten people who are already scheduled for a heart procedure will receive the stimulation while…
Phase: NA • Sponsor: Northwell Health • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:08 UTC
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Taiwan launches national registry to monitor leadless pacemaker outcomes
Knowledge-focused ENROLLING_BY_INVITATIONThis study is a nationwide registry in Taiwan that will follow 300 people who have or will receive a leadless pacemaker. The goal is to track how well the device works and any complications that may occur during or after the procedure. The study does not test a new treatment but …
Sponsor: National Taiwan University Hospital • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:09 UTC