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 ...

Sinus bradycardia, or a slow heart rate, can be a sign of cardiovascular health in healthy young adults and endurance athletes. It can also be a sign of an underlying condition requiring medical ...

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 ...

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.

Thanks to wearable devices, you can use all sorts of metrics to keep track of your health. You can check your weight, blood ...

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