clinical studies are needed for determining ( a ) more accurate quantitation of electrical dose for human use , ( b ) the relative effectiveness of different waveforms , ( c ) the toxicity and damage of electrical shocks to the heart , ( d ) the effects of drugs upon defibrillation threshold , ( e ) improvement of defibrillation techniques , ( f ) optimal placement and size of electrodes , and ( g ) the effects of cardiac disease on defibrillation threshold .
C0018787
heart
C0018799
the