Is pvcs znd tacycardia considered heart disease?

No. Premature ventric contractions (pvcs) and rapid hr (tachycardias) are arrhythmias (abnormal rhythms); can occur with or without intrinsic heart disease. Heart dis. Usually from blood vessel disease. Main cause is atherosclerotic buildup of plaque inside others: infection, xs iron, xs muscle, etc. Abn rhythms can be from xs caffeine, tobacco, alcohol, meds, cocaine, dehydration, fever.
Symptoms. Pvcs and tachycardia might be symptoms of an underlying heart disease but they are not, in and of themselves, heart disease. It's like a fever being a symptom on an infection rather than the actual problem itself.