Originate in the ventricle and cause contraction ahead of the next anticipated beat

A) systole
B) diastole
C) premature atrial contractions (PACs)
D) premature junctional contractions (PJCs)
E) premature ventricular contractions (PVCs)
F) defibrillator
G) tachycardia
H) bradycardia
I) low-density lipoprotein
J) high-density lipoprotein

Premature Ventricular Contractions (PVCs)

Extra, abnormal heartbeats originating from the ventricles of the heart, which can cause the sensation of a skipped beat or palpitations.

Defibrillator

A medical device used to deliver a therapeutic dose of electrical energy to the heart to treat life-threatening cardiac dysrhythmias, especially ventricular fibrillation and ventricular tachycardia.

Low-Density Lipoprotein

Often referred to as "bad" cholesterol, it transports cholesterol particles throughout your body and can build up on the walls of your arteries, potentially leading to heart disease.