Ch 11b: Cardiovascular System: Heart Flashcards
What is the name of the Atrioventricular (AV) valve on the Right side?
Tricuspid Valve
What is the name of the AV valve on the Left side?
Bicuspid Valve
What are the 2 Atrioventricular Valves?
Tricuspid
Bicuspid
What are the 2 Semilunar (SL) valves?
Aortic
Pulmonary
What is the name of the Semilunar valve on the Right side?
Aortic valve
What is the name of the Semilunar valve on the left side?
Pulmonary Valve
What side is the Pulmonary Circuit on?
The right heart
What side is the Systemic Circuit on?
The left heart
Heart depolarizes and contracts without what?
Nervous system stimulation
Rhythm can be altered by what?
Autonomic nervous system
Action potential is initiated by what?
Pacemaker cells
- The __________________ (pacemaker) generates impulse
Sinoastrial (AS) node
- The impulses (0.1 sec) is at the ________________
Atrioventricular (AV) node
- The __________ (bundle of HIS) connects the atria to ventricles
AV Bundle
- The _____________ conduct the impulses through the interventricular septum
Bundle Branches
- The _____________ depolarizes the contractile cells of both ventricles
Purkinje Fibers
Which cardiac innervation is this:
- Increases heart rate
- SA and AV nodes
- Myocardium
- Coronary arteries
Sympathetic
Which cardiac innervation is this:
- Decreases heart rate
- Mostly innervate SA and AV nodes
Parasympathetic
What does the P wave do?
Atrial depolarization
What does QRS complex do?
Ventricular depolarization
What does the T wave do?
Ventricular repolarization
What does the P-R Interval do?
Beginning of atrial excitation to beginning of ventricular excitation
What does the S-T segment do?
Entire ventricular myocardium is depolarized
What does the Q-T interval do?
Beginning of ventricular depolarization through repolarization
What is the reason that Atrial repolarization isn’t able to get picked up on the ECG?
It’s hidden behind the QRS complex
What is the first sound of the heart? (lub)
Closing of AV valves at beginning of ventricular systole
What is the second sound of the heart (dub)
Closing of SL valves at beginning of ventricular diastole
What does the pause between lub-dub indicate?
Heart relaxation
What does the cardiac cycle refer to?
1 complete heartbeat
Both atria and ventricles contract then relax
What does systole mean?
Contraction
What does diastole mean?
Relaxation
What is the Cardiac Output (CO)?
Amount of blood pumped out of ventricle per minute
What is the Stroke volume (SV)?
Amount of blood pumped out of ventricle BEAT
What is Heart Rate (HR)?
Beats per minute
What is the Cardia Output equation?
CO = HR x SV