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Premature Ventricular Contractions (PVCs)

Premature ventricular contractions are extra heartbeats that feel like skips or flutters in the chest. Usually harmless, frequent PVCs can sometimes signal or cause heart problems.

Cardiovascular
Premature ventricular contractions (PVCs) are extra heartbeats that begin in the heart's lower chambers (the ventricles) and briefly interrupt the normal rhythm. The early beat is followed by a short pause and then a stronger-than-usual beat, which is why PVCs are often felt as a "skipped" or "flip-flopping" sensation in the chest. Occasional PVCs occur in most healthy people and are usually harmless, but frequent PVCs deserve evaluation. They are among the most common reasons patients ask about palpitations, and in the large majority of cases the evaluation ends in reassurance. Causes and Triggers: PVCs arise when an irritable spot in the ventricles fires ahead of schedule. Common contributors include:
  • Stimulants: Caffeine, nicotine, alcohol, energy drinks, and some cold medicines can provoke extra beats.
  • Stress and poor sleep: Anxiety, fatigue, and adrenaline all make the heart more irritable.
  • Electrolyte imbalances: Low potassium or magnesium levels commonly trigger PVCs.
  • Thyroid problems: An overactive thyroid speeds and sensitizes the heart; see hyperthyroidism.
  • Underlying heart disease: Coronary artery disease, prior heart attack, and cardiomyopathy can produce frequent PVCs and make them more significant.
Symptoms: Many people never feel their PVCs at all — they are discovered on a routine electrocardiogram. Others notice a skipped beat, a flutter, or a brief pounding sensation, most often when resting quietly or lying in bed at night. Extra beats often become more noticeable during quiet moments simply because there is less distraction — not because the heart is doing worse at night. Symptoms that should prompt more urgent attention include a racing heartbeat that does not stop, lightheadedness, or fainting. Diagnosis: An electrocardiogram confirms that the extra beats are PVCs. Because a brief office tracing may miss them, your physician will often order a wearable monitor for 24 hours to two weeks to count how many PVCs occur per day — the "PVC burden" — and to check for runs of consecutive beats. An echocardiogram evaluates the heart's structure and pumping strength, and blood tests check electrolytes and thyroid function. Frequent runs of ventricular beats are evaluated more urgently because of their relationship to ventricular tachycardia. As a general rule, PVCs carry more significance when the heart is structurally abnormal, so the echocardiogram result carries substantial weight in decision-making. Treatment: Most PVCs in a structurally normal heart need reassurance rather than medication:
  • Trigger reduction: Cutting back caffeine, alcohol, and nicotine, improving sleep, and managing stress often noticeably reduce symptoms. Keeping a log of palpitations alongside caffeine, alcohol, and sleep often reveals a personal pattern worth changing.
  • Correcting reversible causes: Replacing low potassium or magnesium and treating thyroid disease can eliminate PVCs entirely.
  • Medications: When symptoms are bothersome, beta-blockers such as metoprolol or calcium channel blockers such as verapamil can suppress the extra beats.
  • Catheter ablation: For a very high PVC burden or PVCs arising from a single identifiable spot, ablation can eliminate the source — important because tens of thousands of PVCs per day can gradually weaken the heart muscle, a reversible condition called PVC-induced cardiomyopathy.
When to Seek Immediate Care: Call 911 for palpitations accompanied by chest pain, fainting, severe shortness of breath, or a sustained racing heartbeat. These symptoms suggest a more serious rhythm than isolated PVCs. If skipped beats are frequent, worsening, or simply worrying you, an evaluation can usually provide firm reassurance, and most people with PVCs and a structurally normal heart need nothing more than periodic follow-up. Schedule a visit with the internal-medicine team at Zimmer Medical Group to have your rhythm checked and your heart's structure assessed.

Related Medications

Commonly prescribed medications for this condition

MetoprololVerapamil

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