What do hearts and metronomes have in common? Rhythm, of course. Rhythm is especially important for hearts when it comes to performing effective CPR. CPR has been a staple of first aid since the 1740s. When properly performed, it doubles or triples the chances of survival for someone under cardiac arrest. The proper rate of compression is a consistent 100 to 120 beats per minute. When it’s too fast or too slow, the effectiveness of CPR is vastly decreased. Which brings us to metronomes. Usually used by musicians to maintain a steady beat, they can also help first responders stay on beat while performing CPR. A recent study found CPR was 22% more effective when performed to a metronome beat. But since metronomes aren’t usually included in emergency supply kits, the American Heart Association now teaches potential life-savers to hum the song “Stayin’ Alive" by the Bee Gees while performing chest compressions. The song not only has obvious subliminal benefits, but also a beat of 103 beats per minute. The researchers emphasize that keeping the beat isn’t the only important aspect of CPR--proper hand placement and pressure are just as critical. Which is why you should really take today's free lesson on CPR!