Premature atrial contraction
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Premature atrial contraction | |
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Synonyms | Atrial premature complexes (APCs), atrial premature beats (APBs) |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Often asymptomatic, palpitations |
Complications | Atrial fibrillation, supraventricular tachycardia |
Onset | Any age |
Duration | Variable |
Types | N/A |
Causes | Stress, caffeine, alcohol, tobacco, electrolyte imbalance |
Risks | Hypertension, coronary artery disease, heart failure |
Diagnosis | Electrocardiogram (ECG), Holter monitor |
Differential diagnosis | Atrial flutter, atrial fibrillation, ventricular premature contraction |
Prevention | Avoidance of triggers, lifestyle modification |
Treatment | Often not required, beta blockers, calcium channel blockers |
Medication | N/A |
Prognosis | Generally benign |
Frequency | Common |
Deaths | N/A |
Premature Atrial Contraction (PAC) is a common cardiac arrhythmia characterized by early heartbeats originating in the atria, the upper chambers of the heart. These early beats occur before the heart's regular rhythm and are often described by individuals as feeling like the heart has "skipped a beat."
Definition
PACs are extra heartbeats that disrupt the regular, rhythmic beat of the heart. They arise from the atrial muscles firing an electrical impulse prematurely. While generally considered benign, frequent PACs can be indicative of underlying heart conditions or risk factors for more serious arrhythmias.
Causes
The exact cause of PACs can vary, encompassing a range of factors including:
- Stress
- Fatigue
- Caffeine and alcohol consumption
- Smoking
- Certain medications
- Underlying heart disease
Symptoms
Many individuals may not experience any symptoms, while others might feel palpitations or an uncomfortable sensation of the heart skipping a beat. Symptoms are typically fleeting and do not cause lasting discomfort.
Diagnosis
Diagnosis primarily involves the use of an Electrocardiogram (ECG) or Holter monitor to detect the premature beats. The presence of PACs is identified by a premature P wave followed by a QRS complex on the ECG.
Treatment
Treatment for PACs is often unnecessary unless they are symptomatic or indicative of an underlying heart condition. In such cases, treatment focuses on the underlying cause. Lifestyle modifications and, in some cases, medication may be recommended to reduce the frequency of PACs.
Lifestyle Modifications and Management
Advising patients to reduce caffeine intake, quit smoking, and manage stress are common recommendations for those experiencing frequent PACs. Regular monitoring and follow-up with a healthcare provider are essential for individuals with persistent symptoms or those with underlying heart conditions.
Implications
While PACs are generally benign, frequent occurrences can increase the risk of developing atrial fibrillation, a more serious form of arrhythmia. Monitoring and managing risk factors are crucial for individuals with frequent PACs.
External Links
References
- Cardiac Arrhythmias: Practical Notes on Interpretation and Treatment by David H. Bennett
- Clinical Cardiology: Current Practice Guidelines by Demosthenes G. Katritsis, A. John Camm, and Bernard J. Gersh
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Contributors: Kondreddy Naveen, Prab R. Tumpati, MD