My doc says i've got cardiac arrhythmia. what does this mean?

Depends: This is an irregularity of your heart beat and can range from mostly harmless to life-threatening. You need to speak to your primary care doctor to determine which variation you have and the appropriate treatment (or no-treatment) options. Many of these may even need referral to a cardiologist (heart specialist) but speak to your primary care physician to determine the correct course of action.

Abnml heart activity: Arrhythmia ranges from the benign such as pvc's in the setting of a normal heart to the serious such as ventricular tachycardia or fibrillation in the setting of significant heart disease. The latter are both ventricular arrhythmias. Te are a host if atrial arrhythmias as well. You need to get specifics about your arrhythmia.

Cardiac arrhythmia: Translated into plain english: your heart is not beating perfect like a metronome :-) this can be as simple and benign as a skipped beat (everybody has those) to life-threathening as in ventricular tachycardia or ventricular fibrillation. And then there is everything in between. Ask your doctor for a more specific definition and explanation!