Lab Heart and Cardiovascular Physiology Flashcards
How much does a heart weigh
2/3 of a pound
What is the pulmonary circuit
Lungs and back (right)
What’s the systemic circuit
Body and back (left)
What is the myocardium made of
Mostly cardiac muscle
What is the endocardium made of
Simple squamous epithelium
What does pulse do
Increase pressure in artery during systole
What is systolic pressure
The upper larger value 120
What is diastolic pressure
The lower number 80
What causes contraction
Systolic pressure
What causes relaxation
Diastolic pressure
What are the Korotkoff sounds
Sounds heard when measuring blood pressure
What are the heart sounds
Lub dub valves closing
What does the sound lub do
AV valves closing
What does this sound dub do
Semi lunar valves closing
What is a murmur
Improper valve closing
What is an irregular fast atrial rhythm
Atrial flutter
What is a more serious irregular rhythm due to tobacco and alcohol
Atrial fibrillation
What is hypertension
 blood pressure above 140/90
What is hypotension
Low blood pressure
What regulates the cardiac conduction system
Medulla oblongata
What does the SA node do
Generates impulses
What do the atrioventricular bundle do
Connects atria to ventricles
What do the bundle branches do
Conduct the impulses through the interventricular septum
What do the Purkinje fibers do
Depolarize the contractile cells of both ventricles
What is the P-wave
Atrial depolarization
What is the QRS complex
Ventricular depolarization and atrial repolarization 
What is the T wave
Ventricular repolarization
Identify these
Papillary muscle
Chordae tendinae
Tricuspid valve
Pulmonary semilunar valve
Septa
What are intercalated discs
What connects the cardiac muscle cells
What are you got junctions
Chemical and electrical connections between cells
What are desmosomes
Physical connectors
What is the remnants of fetal circulation pattern
Fossa ovalis
What is this
Intercalated discs
What are these
Coronary arteries
What are these
Cardiac veins
What happens here
Depolarization of SA node atrial depolarization causes atrial contraction
What happens here
Ventricular repolarization causes vetricular relaxation
What happens here
Ventricles are completely polarized
What happens here
Ventricular depolarization and atrial repolarization
Ventricular systole and atrial diastole
What happens here
Beginning of atrial excitation to beginning of ventricular excitation
Atria contraction
What happens at the QT interval
Beginning of ventricular depolarization through ventricular repolarization
One complete ventricular action potential
Ventricular contraction and relaxation
