Laura...
Yes....Ventricular rhythms might be benign in some cases...But they can scare the hell out of you and turn malignant in the flash of an eye...More over they can result from other causes; not just meds, toxins, or bad electrolytes...but things like aortic valve dysfunction...the aortic triad.."Angina, syncope, and sudden death"...
I'm glad to hear you got some real help...pre ventricular contractions..(PVCs) emanate from the ventricle itself and are in no way as efficient as beats which begin in the atrium and follow the normal conduction pathways...
Living with the symptoms you describe is the highest terror imaginable..It must of been awful...
":>) JL