Can multiple pvcs in a row cause a sudden drop in bp? enough to cause an arrest or faint? sometimes get hot sensation during runs of two or more

Depends on number: More than 7 PVCs in a row is called ventricular Tachycardia (VT) which is a life-threatening condition. It can drop ur blood pressure, cause u to pass out, & go into cardiac arrest if sustained. Sometimes ur heart goes out of it on its own; however, it's best not to gamble. If u think u have VT, see a doc & get a Holter monitor / event monitor for diagnosis. Don't diagnose urself - c Cardiologist.