PHYSCI 121 Lecture Notes - Lecture 26: Superior Vena Cava, Pulmonary Artery, Cardiomyopathy
Document Summary
Jugular venous distension (neck) because neck veins are distended, they think that there is fluid within them. If you press the top of the foot with your finger, there is a depression at the top of the foot. Lungs are usually black became filled with air, but there is fluid in his lungs, which is why his lungs are white on the x-ray. Right atrium: all the venus blood from head come through the superior vena cava. Depolarization allows the pumping of the blood into the valves and the parts of the heart. There is depolarization of the heart cells: cardiac impulse originates in the sa node, action potential spreads throughout the right and left atria. Electrical progression is briefly delayed at the av node to allow complete ventricular filling before ventricular contraction: cardiac impulse originates in the sa node, action potential spreads throughout the right and left atria.
