CCP Cardioplegia Delivery Methods 3

Question 1

The St. Thomas' Hospital cardioplegia solution is classified as:

Accepted Answer

Extracellular-type crystalloid cardioplegia

Answer

St. Thomas' solution is an extracellular-type crystalloid cardioplegia with sodium and calcium concentrations approximating extracellular fluid.

Question 2

Histidine-tryptophan-ketoglutarate (HTK/Custodiol) cardioplegia is primarily indicated for:

Accepted Answer

Single-dose myocardial protection with extended ischemic tolerance

Answer

HTK solution provides extended single-dose myocardial protection, commonly used for heart transplantation and complex procedures requiring longer ischemic times.

Question 3

During antegrade cardioplegia delivery via aortic root, what pressure range is typically targeted to ensure adequate coronary perfusion without causing distension?

Accepted Answer

50–80 mmHg

Answer

Antegrade aortic root cardioplegia is typically delivered at 50–80 mmHg to achieve adequate coronary distribution without pressure-related myocardial damage.

Question 4

Which potassium concentration range is most commonly used to induce initial cardiac arrest in hyperkalemic cardioplegia?

Accepted Answer

20–40 mEq/L

Answer

Initial cardioplegia doses typically contain 20–40 mEq/L potassium to rapidly depolarize the myocardium and achieve cardiac arrest.

Question 5

Which myocardial temperature target is associated with optimal protection during cold crystalloid cardioplegia?

Accepted Answer

15°C

Answer

Cold crystalloid cardioplegia aims to cool the myocardium to approximately 15°C, markedly reducing metabolic oxygen demand during ischemia.

(CCP) Certified Clinical Perfusionist Practice Test

(CCP) Certified Clinical Perfusionist Practice Test

CCP Cardioplegia Delivery Methods 3