Blood consists mainly of water, and we need a continuous supply of H2O to keep your blood thin so it can move through your system more easily. If you're dehydrated, even slightly, your heart has to work harder to pump blood, which can increase your heart rate and cause an irregular heartbeat or palpitations.

Can dehydration affect heart rhythm?

A lack of sufficient fluid in the body can temporarily cause confusion and put you at risk for falls. When severe, dehydration can lead to a rapid or irregular heart rate, low blood pressure, fainting and even death.

What triggers arrhythmia?

Common triggers for an arrhythmia are viral illnesses, alcohol, tobacco, changes in posture, exercise, drinks containing caffeine, certain over-the-counter and prescribed medicines, and illegal recreational drugs.