Anatomy Pt 2 Flashcards
How many pulmonary veins empty oxygenated blood into the left atrium?
- 4
What structure is responsible for delivering the signal to the muscle of the ventricles?
- Purkinje fibers
What vessel drains the coronary blood from the right ventricle?
- Small cardiac vein
What causes the coronary sinus to dilate?
- Increased right atrial pressure
What are the atria doing during diastole?
- Emptying into the ventricles
What portion of the aorta is located below the diaphragm?
- Descending abdominal aorta
Which valve is the most inferior in the heart?
- Tricuspid valve
What is true regarding the correlation of electrical stimulus and mechanical function?
- There is a slight delay between electrical stimulus and mechanical systole in all patients
What portion of the aorta is located between the innominate artery and the left subclavian artery?
- Arch
What cardiac chamber is closest to the spine?
- Left atrium
The pulmonary artery flow normally demonstrates a _____ due to _____ flow when compared to the aortic flow.
- Longer acceleration time, lower resistance
What term refers to a thin central portion of the interatrial septum in an adult patient?
- Fossa ovalis
In most patients, the posterior descending coronary artery originates from the?
- Right coronary artery
Where is the oblique sinus?
- Posterior to the left atrium
How many papillary muscles are normally in the left ventricle?
- 2 papillary muscles
The IVRT begins after the ____ on the EKG and the IVCT begins after the ______ on the EKG.
- T wave, R wave
What is the IVRT?
- Time from closure of the aortic valve to opening of the mitral valve
What is the IVCT?
- Time from closure of the mitral valve to the opening of aortic valve
As a patient ages, what normally happens to the pulmonary venous flow?
- The systolic component increases while the diastolic component decreases
- (S/D ratio increases)
What is the parietal layer of the pericardium composed of?
- Thick fibrous material
The coronary sinus is located on the ______ side of the heart and empties into the ________.
- Posterior, right atrium
What three things have an influence on stroke volume and cardiac output?
- Preload
- Afterload
- Myocardial contractility
Central venous pressure refers to pressure in what?
- Vena cava (near the junction of the atrium)
What causes deformation of the PV leading to a display of an “a” wave on the m-mode tracing?
- The right atrial contraction
The pericardial space around the heart is found between what two layers of the cardiac wall?
- Epicardium, parietal pericardium
When does the aortic valve normally open on an EKG?
- Approximately 30-35 ms after the completion of the QRS wave
How do you differentiate between an epicardial fat pad and a pericardial effusion?
- An epicardial fat pad is usually seen as an isolated anterior echo free space and a small pericardial effusion will be demonstrated as an anechoic space posterior to the heart
When does mechanical systole occur in the left ventricle on an EKG?
- Just after the QRS complex
Compared to the other valves, the pulmonic valve is the most ______ and _______ valve in the heart.
- Superior, anterior
Why does the foramen ovale close in most babies after birth?
- Due to the pressure in the left atria holding the flap of tissue closed over the opening
The basal area of the left ventricle refers to the left ventricle at the level of what?
- Mitral valve
What is a muscular band that stretches from the ventricular septum to the right ventricular free wall near the apex?
- Moderator band
What is the infundibulum a part of?
- Proximal RVOT
What portion of the aorta is located from the isthmus to the diaphragm?
- Descending thoracic aorta
Expiration causes a ________ in flow toward the heart in the upper extremities.
- Decrease
What is normal flow in the coronary arteries?
- Early in ventricular diastole flow moves into the coronary arteries
The interventricular septum is normally seen with mild bowing toward what?
-Right ventricle