As far as we know, Global Warming will not cause a heart attack.
At the Climate Change Conference in Copenhagen, Denmark, scientist Henrik Svensmark was participating in a panel discussion when his heart got out of rhythm. Svensmark literally falls out of his seat when his Implantable Cardiac Defibrillator (ICD) kicks in and delivers a shock to his heart. A moment later he receives a second shock. The camera cuts away, but you can hear Svensmark cry out as a third ICD shock hits him.
The third time is the charm as his heart regains an acceptable rhythm. Svensmark was taken to the hospital where he is recovering.