lab exam 2

AV node

Bundle of His

Purkinje fibers

Bundle branches

List the cardiac conduction system starting with the SA node.

Sa node, AV node, AV bundle, bundle branches, & purkinje fibers.

Sa node

What wave is this & what does it mean?

P wave: depolarization of SA node and atria

What wave is this & what does it mean?

T wave: ventricular repolarization

What complex is this & what does it mean?

QRS complex: ventricular depolarization and atrial repolarization

what interval is this & what does it mean?

P-R interval: beginning of atrial excitation to beginning of ventricular excitation

what interval is this & what does it mean?

Q-T interval: beginning of ventricular depolarization through ventricular repolarization

1. 6 beats

2. 0.8

3. 75 beats per minute

4. Normal

What causes the first heart sound. “LUB”

the closing of the atrioventricular valves

What causes the second heart sound. “Dub”

Closing of the semilunar valves.

What is 1 & 2?

1. Facial artery 2. Common carotid.

In order.

1. Radial artery

2. Ulnar artery

3. Brachial artery

4. Axillary artery

In order.

1. Radial artery (thumb side)

2. Ulnar artery (pinky side)

In order.

1. Superior vena cava

2. Ascending aorta

3. Inferior vena cava

4. Pulmonary trunk

5. Pulmonary vein

1. Brachiocephalic trunk

2. Left common carotid

3. Left subclavian artery

In order.

1. Right subclavian artery

2. Right subclavian vein

3. Brachiocephalic trunk

4. Thoracic aorta

5. Internal jugular vein

1, 2 & 3.

1. Ivc

2. Common iliac vein

3. External iliac vein

4, 5 & 6.

4. Renal vein

5. Gonadal vein

6. Great saphenous vein

Vertebral arteries

Basillar artery

Vein

Artery

Trace a drop of blood from liver to the spleen.

Liver → Hepatic Veins → Inferior Vena Cava → Right Heart → Lungs → Left Heart → Aorta → Celiac Trunk →Splenic Artery → Spleen.

Trace a drop of blood from the right renal vein to the left renal artery.

Right Renal Vein

Inferior Vena Cava (IVC)

Right side of heart

Lungs (where carbon dioxide is dropped off and oxygen is picked up)

Pulmonary Veins

Left Atrium

Left Ventricle

Aorta ( → Descending Thoracic Aorta → Abdominal Aorta)

Left Renal Artery

Trace a drop of blood from the left medial ankle to the right atrium.

Left Great Saphenous Vein → Left Femoral Vein → Left External Iliac Vein → Left Common Iliac Vein →Inferior Vena Cava (IVC) → Right Atrium

Trace a drop of blood from thoracic cage to rectum.

Intercostal Veins → Azygos Vein → Superior Vena Cava → Heart (Right → Lungs → Left) → Aorta → Inferior Mesenteric Artery → Rectum

How do we find MAP?

MAP = Diastolic pressure +( Pulse Pressure/3 )

If BP is 120/80, what is MAP? Remember find pulse pressure first.

93