Cardiology Flashcards

1
Q

What tissue does the heart arise from?

A

Mesoderm

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2
Q

When does the upper cardiac tube begin beating?

A

Day, 20

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3
Q

What direction does the linear cardiac to bend toward?

A

The linear tube begins to bend toward the right side on day 21. Right sided or D – looping.

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4
Q

When is heart formation complete?

A

Hart formation is complete by 7 to 8 weeks gestation

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5
Q

What cardiac output does the placenta receive?

A

45%. It is the organ with the lowest vascular resistance.

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6
Q

What keeps the DA patent in utero?

A

Prostaglandins (PGE2)
Prostacyclin (PGI2)
Thromboxane A2

E2 I2 A2… all end in 2 (in u2ero)

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7
Q

What prostaglandin keeps the DA, Open in utero versus the medication we give.

A

PGE2 in u2ero

PGE1 is the IV prostin we give

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8
Q

What is the oxygen saturation of the umbilical vein?

A

70 to 80%
PO2 of 27-35

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9
Q

What are on the x and y axis of the oxyhemaglobin curve?

A

X (horizontal/bottom) pO2
Y (vertical/top) HbO2 sat %

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10
Q

How does fetal hemoglobin affect the oxy hemoglobin graph?

A

It is shifted to the right. it has more affinity for oxygen. So at the same PO two, more will be saturated.

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11
Q

Mean BP Equation

A

MAP = DBP + 1/3 (SBP-DBP)

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12
Q

What are the nine cyanotic heart lesions?

A

Transposition. Tetralogy. TAPVR. Truck for Theresa. Truncus

Single ventricle.
Pulmonary Trisha
Epstein anomaly.
DORV

If you have 5Ts you’ll go to SPED.

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13
Q

Tuberous sclerosis and cardiac

A

Auto Dom, chromosome 9 & 16
Rhabdo in Heart
Ashleaf spot - hypopigmentation
Woods lamp

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14
Q

When does cardiogenesis begin?
Beat? Separations?

A

5th - paired heart tubes
6th - beating
7-8th - separation

Best cheer voice: “OK! 5, 6, 7, 8! Form the heart and separate!”

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15
Q

Make the 6 aortic arches

A

1,2 disappear early. 1 maxillary
3 carotid artery
4 subclavian (right), aortic arch (left)
5 involutes
6 PDA (left)

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