V&A Images / Alamy Stock Photo William Morris' Trellis wallpaper design (1864) shows a regular rhythm in the grid of squares created by the trellis. There is also flowing rhythm in the natural ...

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 ...