| PNH | paroxysmal nocturnal hemoglobinuria; polynuclear hydrocarbon |
|---|---|
| SPAF | spontaneous paroxysmal atrial fibrillation |
| SPD | schizotypal personality disorder; sociopathic personality disorder; specific paroxysmal discharge; s... |
| MAT | Multifocal Atrial Tachycardia |
| SSS | Sick Sinus Syndrome = Tachycardia-Bradycardia Syndrome |