Energy and Endurance

O2+Pi=AMP+O2+Pi+Pi=ADP+O2+Pi+Pi+Pi=ATP

ATP Utilization and Metabolism...

700 mg ATP in cardiac tissue

At HR of 60 we utilize ~ 70 mg/second

700 mg lasts 10 seconds ~ about 10 heartbeats

86,000 beats/day = 6 million mg ATP utilized

Myocardial ATP turns over ~ 10,000 times/day!

"Heart"

"Just in Time" Production and Transport