I don't know anything about hearts or pacemakers, and my opinion is not worth the electrons used to transmit it. But I do want to point out threads like this are further evidence of the quality of this forum. When not here, I'm usually in the A & S forum. Folks there frequently post questions about the law, a topic about which I do know something, and the level of idiocy in the responses is appalling. With age comes wisdom, and the ability to recognize the line between what we know and what we don't.