I was fascinated to find this video about two doctors, Billy Cohn and Bud Frazier, "who in March of 2011 successfully replaced a dying man's heart with a 'continuous flow' device they developed, proving that life was possible without a pulse or a heart beat". You can read more about it here, or on its Vimeo home page.
It must be really strange to be walking around with no discernible heartbeat at all! As a heart attack and bypass surgery survivor, I can sympathize with the patient rather more than those who haven't had those experiences. I wonder how long this thing can or will last? Does it need more or less frequent replacement? How does it cope with increased physical exertion - can one dial up the blood flow to provide more oxygen?
Kudos to the two doctors for bringing something new to the health care table. I don't know if this will ever become a viable long-term replacement for a damaged heart, but it's encouraging to see that options like this are under development. Who knows? I may need one myself sometime!