To make a word pertaining to the heart and blood vessels is（）. A: cardioventricular B: cardioversion C: cardiovalvular D: cardiovascular

When ventricular tachycardia causes hypotension, heart failure, or myocardial ischemia, the most important Treatment is? () A: Atropine B: Isoproterenol C: Lidocaine D: Pacemaker E: asynchronized DC cardioversion

When<br/>ventricular tachycardia causes hypotension, heart failure, or<br/>myocardial ischemia, the most important treatment ___?() A: Pacemaker B: Isoproterenol C: Lidocaine D: Synchronized<br/>DC cardioversion E: Beta-blocker