Most cases of irregular heartbeat are benign and resolve without treatment. However, specific patterns — sudden onset, severity, associated symptoms, or high-risk context — indicate that irregular heartbeat may signal a serious or life-threatening condition requiring immediate care.
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Start Free AI Analysis →When should I call 999/112 for irregular heartbeat?
Call emergency services immediately if irregular heartbeat is sudden and severe, accompanied by chest pain, difficulty breathing, confusion, facial droop, arm weakness, or slurred speech. Do not wait.
Can irregular heartbeat be dangerous without other symptoms?
Yes. Isolated but very severe or sudden-onset irregular heartbeat can indicate a serious condition even without other obvious symptoms. When in doubt, seek emergency evaluation.
How do I know if my irregular heartbeat is an emergency?
Use the 'STOP' test: Severe (8-10/10), Thunderclap onset, Other alarming symptoms (fever, confusion, chest pain), or Progression despite rest. If any apply, seek emergency care.
Possible Causes