Sinus arrhythmia is a variation in the heart's sinus rhythm, usually caused by changes in a person's breathing cycle. It's a ...

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 ...

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 ...

Many studies of patients with heart failure (HF ... Furthermore, the proportion of time in sinus rhythm whilst on assigned antiarrhythmia therapy did not effect these outcomes in the 1,316 ...

The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node, or SA node.

AFib causes an irregular heart rate that can make your heart feel as if it is fluttering or skipping beats. Panic attacks, on ...

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