sinus rhythm
Heart's default pace
Sinus rhythm is the normal electrical pattern of the heartbeat, originating from the sinoatrial node—the heart's natural pacemaker.
A healthy heart in sinus rhythm beats steadily at 60 to 100 beats per minute.
The term appears most often in medical contexts: The EKG showed normal sinus rhythm.
Contrast with arrhythmias like atrial fibrillation.
Heart's electrical activity record
- atriumRoofed central hall
- ventricleHollow organ chamber
- conductionHeat transfer through contact
- depolarizationLoss of electrical gradient
repolarization · electrophysiology · cardiac cycle · pacemaker · heart rate · waveform · tracing
Disorganized cardiac rhythm disorder
- tachycardiaExcessively fast pulse
- bradycardiaAbnormally slow heart rate
- flutterRapid light movement
- arrhythmiaAbnormal cardiac rhythm
heart block · conversion · cardioversion · ablation · antiarrhythmic · irregularity · palpitation · dysrhythmia
Standard for comparison
- regularOccurring at fixed intervals
- consistentNot varying or contradicting
- stableSecure and unchanging
- healthyIn good physical condition
physiological · resting heart rate · pulse · heartbeat · homeostasis · parasympathetic · sympathetic · coherence
electrocardiogram
Heart's electrical activity record
- atriumRoofed central hall
- ventricleHollow organ chamber
- conductionHeat transfer through contact
depolarization · repolarization · electrophysiology · cardiac cycle · pacemaker · heart rate · waveform · tracing
atrial fibrillation
Disorganized cardiac rhythm disorder
- tachycardiaExcessively fast pulse
- bradycardiaAbnormally slow heart rate
- flutterRapid light movement
arrhythmia · heart block · conversion · cardioversion · ablation · antiarrhythmic · irregularity · palpitation · dysrhythmia · reentry
baseline
Standard for comparison
- regularOccurring at fixed intervals
- consistentNot varying or contradicting
- stableSecure and unchanging
healthy · physiological · resting heart rate · pulse · heartbeat · homeostasis · parasympathetic · sympathetic · coherence · synchrony
sinus rhythmarrhythmia
Abnormal cardiac rhythm
atrial fibrillation · cardiac arrhythmia · dysrhythmia · irregular heartbeat · ventricular fibrillation