Patho CVS 204 - Exam 1 Latest Update 2025-2026
100 Questions and 100% Verified Correct
Answers Guaranteed A+
atrial diastole/ventricular systole - CORRECT ANSWER: Atrial is filling and contraction
of ventricles
atrial systole/ventricular diastole - CORRECT ANSWER: Atrial is contracting and
ventricles are filling with blood
AV node (atrioventricular node) - CORRECT ANSWER: - AV junction incl. the AV node
and Bundle of His
- Electrical Bridge btw Atria and Ventricle
- Located at base of IAS extending to Ventricular septum
- Impulses delayed slightly
- 40-60bpm
- Allows for ventricular filling
- Area vulnerable to blocks in conduction
- Located on the Rt side of the IAS immediately behind the TV and near the opening of
the coronary sinus.
- In most adults, the AV node is supplied by the RCA. Otherwise it is supplied by the Lt
circumflex artery
AV Node 3 functional regions - CORRECT ANSWER: - Arial nodal (AN) - upper
junctional region or transitional zone
- The nodal (N) region - midportion of AV node
- The nodal HIS (NH) - lower junction region. Fibers of AV node merge gradually
w/bundle of HIS
Bundle of HIS - CORRECT ANSWER: - Thin bundle of subendocardial threads
, - located Rt side of IAS just above the ventricles
- Bifurcates into Rt and Lt bundle branches
- Electrical impulses pass through AV node to bundle of HIS
- It is normally the only electrical connection btw the atria and ventricles
- Receives blood from branches of the anterior and posterior descending coronary
arteries.
- Due to its blood supply, it is less vulnerable to ischemia damage
- 20-40 bpm
Can blood stay static with the Tribeculae Carnae lining? - CORRECT ANSWER: No
Endocardium - CORRECT ANSWER: Thin smooth inner layer, composed of
endothelium.
Epicardium - CORRECT ANSWER: Thin smooth outside layer
Intrinsic Rates - CORRECT ANSWER: SA Node - 60-100bpm
AV Node - 40-60bpm
Ventricular 20-40bpm (purkinje fibers)
Left Atrium - CORRECT ANSWER: - Is the most posterior structure of the heart.
- The LA receives oxygenated blood from the 4 pulmonary veins, two on the right and
two on the left.
- The pulmonary veins drain blood into the medial part of the LA.
- LA smaller than the RA
- LA wall thickness 2mm
- The walls are slightly thicker due to the higher pressure found in the left side of the
heart.
100 Questions and 100% Verified Correct
Answers Guaranteed A+
atrial diastole/ventricular systole - CORRECT ANSWER: Atrial is filling and contraction
of ventricles
atrial systole/ventricular diastole - CORRECT ANSWER: Atrial is contracting and
ventricles are filling with blood
AV node (atrioventricular node) - CORRECT ANSWER: - AV junction incl. the AV node
and Bundle of His
- Electrical Bridge btw Atria and Ventricle
- Located at base of IAS extending to Ventricular septum
- Impulses delayed slightly
- 40-60bpm
- Allows for ventricular filling
- Area vulnerable to blocks in conduction
- Located on the Rt side of the IAS immediately behind the TV and near the opening of
the coronary sinus.
- In most adults, the AV node is supplied by the RCA. Otherwise it is supplied by the Lt
circumflex artery
AV Node 3 functional regions - CORRECT ANSWER: - Arial nodal (AN) - upper
junctional region or transitional zone
- The nodal (N) region - midportion of AV node
- The nodal HIS (NH) - lower junction region. Fibers of AV node merge gradually
w/bundle of HIS
Bundle of HIS - CORRECT ANSWER: - Thin bundle of subendocardial threads
, - located Rt side of IAS just above the ventricles
- Bifurcates into Rt and Lt bundle branches
- Electrical impulses pass through AV node to bundle of HIS
- It is normally the only electrical connection btw the atria and ventricles
- Receives blood from branches of the anterior and posterior descending coronary
arteries.
- Due to its blood supply, it is less vulnerable to ischemia damage
- 20-40 bpm
Can blood stay static with the Tribeculae Carnae lining? - CORRECT ANSWER: No
Endocardium - CORRECT ANSWER: Thin smooth inner layer, composed of
endothelium.
Epicardium - CORRECT ANSWER: Thin smooth outside layer
Intrinsic Rates - CORRECT ANSWER: SA Node - 60-100bpm
AV Node - 40-60bpm
Ventricular 20-40bpm (purkinje fibers)
Left Atrium - CORRECT ANSWER: - Is the most posterior structure of the heart.
- The LA receives oxygenated blood from the 4 pulmonary veins, two on the right and
two on the left.
- The pulmonary veins drain blood into the medial part of the LA.
- LA smaller than the RA
- LA wall thickness 2mm
- The walls are slightly thicker due to the higher pressure found in the left side of the
heart.
