Marakanetz, and the normal heartbeat is closer to 1 beat per second ( mine is about 51 beats per minute, when I don't get upset over utter nonesense such as this).
Although the literature does show that there are health issues associated with continuous exposure to ultra low frequency vibrations, including sound, there is nothing that indicates that there is any immediate effect on the heart. It can make one nauseous, however. Believe me, I have taken many vibration readings on industrial machinery where I was surrounded by loud low frequency vibrations and sound, it wasn't pleasant, but I never suffered any heart problems.
Salut, Bob p.