Read more A 40-year-old Australian man was given a titanium heart that helped him survive for more than 100 days. Imagine ripping open a person's chest, taking out his heart and then replacing it ...

It's tipped slightly so that a part of it sticks out and taps against the left side of the chest, which is what ... the same size as two fists. Your heart beats about 100,000 times in one day ...

You may notice these feelings in your chest, neck, or throat. Many people describe feeling like their heart is working too hard or beating irregularly. You feel heart palpitations for more than ...

Sometimes, the rhythm of the heart's natural pacemaker process becomes disrupted - a person's heart beats abnormally ... between the skin of the upper chest and the chest muscle.