It's What's Inside That Counts
Thickest chamber of the heart
What is the left ventricle
Tip of the left ventricle
What is the apex
Heart's dominant pacemaker
What is the SA node
Blood flows from the left atrium to the left ventricle through this valve
What is the Bicuspid (Mitral) Valve
Lubb-Dubb
What are S1 & S2 sounds
Heart's anatomical location
What is mediastinum
Phase of relaxation
What is diastole
Part of the electrical conduction pathway that slows down the impulse coming from the SA node to allow the ventricles to properly fill
What is the atrioventricular node
Pump for pulmonary circulation
What is the right side of the heart
Ensures blood is delivered to heart even if major vessels are occluded
What is collateral circulation
A few milliliters of this fluid fills the pericardial cavity
What is pericardial fluid
Strength of contraction
What is contractility
SA node initiates an action potential about every ___ second
What is 0.6
Deoxygenated blood flows to the lungs to get oxygenated via these vessels
What are the pulmonary arteries
MAJ Z's mean arterial pressure formula
What is (Systolic BP + (Diastolic BP x 2)) / 3
T P M A
What are heart valves
Volume of blood ejected by the ventricles each minute
What is cardiac output
This ion rushes into the cell and produces a rapid depolarization
What is sodium
The volume remaining in each ventricle at the end of systole
What is end-systolic volume
Difference between systolic and diastolic pressure
What is pulse pressure
This phase happens, but is never seen on a standard EKG because it is always hidden within the QRS complex
What is atrial repolarization
Within limits, the more the heart fills with blood during diastole, the greater the force of contraction during systole
What is Frank-Starling Law of the heart
Cardiac autorhythmic fibers are able to generate their own action potential because of these structures
What are leaky channels
The right atrium receives deoxygenated blood from
What are the superior vena cava, inferior vena cava, and coronary sinus
The SA node is primarily supplied with oxygenated blood via this vessel
What is the RCA