EKG 5th pd

Symptoms and signs of cardiac compromise

• Cool pale skin
• Vomiting
• Chest pain
• All of the above

What is depolarization?

• The ability of the heart muscle cells to shorten in response to an electrical stimulus.
• The electrical activation of the cells of the heart that initiates contraction of the heart muscle.
• The ability of the heart cells to receive and transmit an electrical impulse.
• The return of heart muscle cells to their resting electrical state, causing the heart muscle to relax.

What is the space between the between the two ventricles called?

• Intraventricular Septum
• Interatrial Septum
• Tricuspid valve
• Internodal Pathway

How long is a normal cardiac cycle?

• 0.4 seconds
• 1.2 seconds
• 0.8 seconds
• 0.7seconds

What is the Isoelectric line on an ekg?

• the last deflection seen on the ekg
• the baseline for an ekg graph
• the ongoing line after the ST segment
• the first upward deflection on an ekg

What is depolarization?

• The ability of the heart cells to receive and transmit an electrical impulse.
• Electrical activation of the cells of the heart that initiates contraction of the heart muscle
• An area of specialized cells in the upper right atrium that initiates the heartbeat
• The return of heart muscle cells to their resting electrical state, causing the heart muscle to relax.

What is the innermost layer of the heart?

• Endocardium
• Myocardium
• Pericardium
• Epicardium

Which valve is responsible for transporting deoxygenated blood to the right ventricle?

• Mitral/bicuspid valve
• Pulmonary valve
• Atrial valve
• Tricuspid valve

What is the difference between contractility and conductivity?

• Contractility is how strong the heart resists or conducts electric currents while conductivity is the innate ability of the heart muscle to contract while conductivity is how the heart conducts electric currents
• Contractility is the hearts innate ability to contract while conductivity is how strongly it resists or conducts electric currents
• Contractility is how the heart is able to pump blood while conductivity is how to heart releases blood
• Contractility is how the heart brings blood in while conductivity is how blood is released

What happens with the heart during systolic?

• The heart chambers are relaxing and filling.
• The heart muscle contracts, creating pressure to open pulmonary and aortic valves.
• The SA node sends an impulse to the atrium
• the cycle of polarization occurs