Download The Heart

Review Heart Quiz # 2 - Conduction system, ECG &
Cardiac cycle
Name: _______________________________________
Draw in & label the parts of the conduction system
AV bundle
AV node
bundle branches
purkinje fibers
sinoatrial node
_______________________________________________________________________
Match to the description/function to the part of the conduction system
- Use labels from diagram
_______________penetrate into ventricular myocardium
_______________initiates depolarization wave
___________________________________septal cell excitation (2 answers)
____________________delays impulse momentarily
_______________________________________________________________________
What is the function of each of the following in regards to the cardiovascular system?
a. parasympathetic NS: _____________________ heart rate & force
b. sympathetic NS: _______________________ heart rate & force
c. gap junctions: ________________________ cell to cell transmission
_______________________________________________________________________
Match the description with the portion of the ECG diagram that records it.
_____atrial depolarization
_____atrial repolarization hidden
_____precedes atrial contraction
P wave
_____precedes ventricular contraction
QRS complex
_____ventricular depolarization
T wave
_____ventricular repolarization
__________________________________________________________________
Sketch ECGs that show each of the following:
a. Normal waves
b. Fibrillation
c. Heart block: extra P waves
1.
An echocardiogram is an ultrasound of the heart to visualize if the ______________ &
_________________ (structures) are working correctly while an electrocardiogram indicates if the
_______________________ system is sending the __________________ signal correctly.
2. During ventricular filling, the pressure in the heart is _______. The _______________ valves
are open while the ______________ valves are closed, so the blood flows passively from the
_______________ into the ______________. The _____ node sends a signal to the atria that is
recorded on the ECG as a ____ wave. This causes atrial ________________ which forces the
remaining percentage of blood into the ventricles. As the _____________________ begins to rise
in the ventricles, the _______ valves begin to close to prevent backflow.
The ______ node holds the electrical signal while the atria finish contracting. The ventricles then
receive an electrical signal from the ________________, _________________, &
_______________ fibers which is recorded as the ________________________ on the ECG.
This causes ventricular __________________. During this time, both sets of valves are closed for
a very short time period. This is known as the ________________________________ phase. As
the pressure increases, the _____________________ valves are forced open and blood is
expelled into the ______________________ and ________________________. This is known
as the ventricular ___________________________ phase.
All signaling from the _______________________ system now stops as indicated by the _______
wave in order for the heart to begin the isovolumetric relaxation phase (ventricular diastole),
the _______________________relax so the ____________________ drops. The
___________________ valves are shut by the backflow of blood
 Aorta
 Heart Valves
 Relax
 Atria
 Isovolumetric
 SA
contraction
 AV
 SL
 Low
 AV bundle
 Systole
 P
 Bundle branches
 T
 Pressure
 Conduction
 Ventricles
 Pulmonary trunk
 Ejection
 Purkinjie
 Electrical
 QRS complex
 Heart Muscle
_______________________________________________________________________
1. Define the following:
a. systole
b. diastole
c. echocardiogram
d. electrocardiogram
2. List the time length of each of the phases of the cardiac cycle include unit.
a. entire cycle _____secs
b. ventricular systole _____secs
c. atrial systole _____secs
d. quiescent period _____secs
3. The first sound of the heart beat is the _______ valves closure while the second sound of the
heart beat is the _______ valves closure.