Our easy-to-read patient fact sheet compares and contrasts sinus arrhythmia vs AFib (atrial fibrillation) symptoms.

Sinus arrhythmia is a variation in the heart's sinus rhythm, usually caused by changes in a person's breathing cycle. It's a common finding, especially in children and young adults, and its ...

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia ...

The heart rate increases with inspiration, due to the Bainbridge reflex, and decreases with expiration. The ECG criteria to diagnose sinus arrhythmia is a variation of the P-P interval ...

In the heart, β-adrenergic receptors are primarily responsible for responding to SNS signals. With a sustained block of the SNS, the researchers observed loss of the day-night rhythm in sinus node ...

Amiodarone effectively maintains sinus rhythm in patients with atrial fibrillation ... except for patients with substantial left ventricular hypertrophy or heart failure. This treatment approach ...

and prognostic tool [1] for acute and chronic heart failure. The purpose of this study was to clarify the relationship between successful restoration and maintenance of sinus rhythm (SR ...

Medically reviewed by Richard N. Fogoros, MD Ventricular tachycardia (V-tach or VT) is when the lower chamber of the heart ...

Objective: To test whether ventilatory thresholds, measured during an exercise test, could be assessed using time varying analysis of respiratory sinus arrhythmia frequency (f RSA). Conclusions: ...