The heart’s upper chambers (atria) and lower chambers (ventricles) work together, taking turns squeezing (contracting) and relaxing to pump blood through the heart. The heart’s electrical system is the power source which makes this possible.
Heart, Vascular & Thoracic Institute (Miller Family)
The heart’s upper chambers (atria) and lower chambers (ventricles) work together, taking turns squeezing (contracting) and relaxing to pump blood through the heart. The heart’s electrical system is the power source which makes this possible.
