SUMMARY. The del Nido cardioplegia solution was originally developed for infant and pediatric patients and has been in use for 18 years at Boston Children’s Hospital. This cardioplegia is generally given as a single 20-mL/kg dose antegrade at 8–12°C through a recirculating delivery system.
What is Microplegia?
Background: Microplegia (whole blood cardioplegia with reduced volume) retains all the advantages of blood cardioplegia (such as superior oxygen-carrying capacity, better osmotic properties and antioxidant capability, etc.) without the potential disadvantages of hemodilution (such as myocardial edema).
What is cardioplegia made of?
Each 100 mL of solution contains Calcium Chloride Dihydrate USP 17.6 mg, Magnesium Chloride, Hexahydrate USP 325.3 mg, Potassium Chloride USP 119.3 mg and Sodium Chloride USP 643 mg in Water for Injection, USP.
What is the purpose of cardioplegic solution?
Solution. Cardioplegia Solution A is a sterile, non-pyrogenic solution for cardiac perfusion in a Viaflex bag. It is used to induce cardiac stasis and to protect the myocardium during open-heart surgery.What are the types of cardioplegia?
One of the most important myocardial protection techniques is cardioplegia – indirect or direct administration of cardioplegic solution to the coronary arteries. Both crystalloid cardioplegia and blood cardioplegia are widely used in pediatric cardiac surgery [1–3].
What is buckberg cardioplegia?
Modified Buckberg cardioplegia is a dextrose-based solution in normal saline with potassium chloride as the depolarizing agent, tromethamine as the buffer, and citrate phosphate double dextrose as a calcium chelator and delivered 4:1 oxygenated patient’s blood to crystalloid.
What is del Nido cardioplegia?
The del Nido cardioplegia is delivered with 20% by volume fully oxygenated patient blood, which supports aerobic metabolism for a finite period of time and provides buffering properties to promote anaerobic glycolysis as well.
What causes stone heart?
Stone heart has occurred only during aortic valve replacement and/or coronary artery bypass procedures. Predisposing factors are chronic congestive heart failure and myocardial hypertrophy with fibrosis secondary to longstanding aortic valve disease and/or coronary artery occlusive disease.Why does the heart stop in systole in hypercalcemia?
At the end of the action potential plateau, influx of calcium ions into muscle fibers is suddenly interrupted, and the calcium ions in the sarcoplasm are rapidly pumped back into the sarcoplasmic reticulum and t-tubules, thereby ending contraction until the next action potential.
What are cardioplegic drugs?Cardioplegic Description. Baxter Cardioplegic Solution is a sterile, nonpyrogenic, essentially isotonic, formulation of electrolytes in Water for Injection, USP. It is a “core solution” intended for use only after addition of sodium bicarbonate to adjust pH prior to administration.
Article first time published onWhere is cardioplegia injected?
A cross-clamp is applied to the ascending aorta, and the cardioplegia is administered into the aortic root in an antegrade fashion via the coronary ostia. Retrograde cardioplegia is used routinely in many institutions by infusion into the coronary sinus with backward filling of the cardiac veins.
Why potassium is used in cardioplegia?
Chemically, the high potassium concentration present in most cardioplegic solutions decreases the membrane resting potential of cardiac cells. The normal resting potential of ventricular myocytes is about -90 mV.
How do you prepare for cardioplegia?
make the solution, add the following to 1 liter of dH 2 O while mixing using a magnetic stirrer: 0.99 g of glucose (5.50 mM), 0.13 g of magnesium sulfate (0.50 mM), 1.79 g of potassium chloride (24.00 mM), 1.68 g of sodium bicarbonate (20.00 mM), 6.37 g of sodium chloride (109.00 mM), 0.12 g of sodium phosphate …
Who invented cardioplegia?
The term cardioplegia (cardio, heart and plegia, paralysis) was first introduced by Lam in 1957 (Lam et al., 1957), yet the method of arrest has its roots in the early experiments of British physiologist Sidney Ringer using the frog heart (Figure 2).
What is asystole?
Asystole is also known as flatline. It is a state of cardiac standstill with no cardiac output and no ventricular depolarization, as shown in the image below; it eventually occurs in all dying patients.
What is crystalloid cardioplegia?
Cardioplegia protects the heart from ischemic injury and postoperative heart failure during cardiopulmonary arrest period. Initially crystalloid cardioplegia was introduced as an agent to allow for hypothermic hyperkalemic arrest.
When should I Redose del Nido cardioplegia?
A multitude of studies have demonstrated equivalent myocardial protec- tion compared with conventional cold blood cardioplegia in adult cardiac surgery, with the advantage of a single dosing regimen. Expert opinion suggests redosing if the ischemic time is likely to extend much beyond 90 mi- nutes.
What is cold blood cardioplegia?
The technique of myocardial protection by means of a cardioplegic solution consisting of cold blood (10 degrees C) with potassium (30 mEq. per liter) is described. A disposable cooling coil is used and a separate pump head for coronary perfusion is avoided.
What is St Thomas cardioplegia?
St. Thomas’ cardioplegic solution No. 2 (ST) has been a popular crystalloid cardioplegia among cardiac surgeons; however, it must be administered repeatedly at short intervals during the surgery. Increases in myocardial acidosis between the doses have been noted, affecting the postoperative outcome adversely [2, 3].
What is Sondergaard's groove?
Posterior and parallel to the terminal groove is a second, deeper groove between the right atrium and the right pulmonary veins. Dissections into this deep interatrial groove, also known as Waterston’s or Sondergaard’s groove, permit incisions to be made into the left atrium (Fig. 47-9).
What is St Thomas solution?
St. Thomas solution is an extracellular, potassium-based cardioplegia solution that can be administered as a crystalloid solution or combined with a blood component. At the time, the addition of magnesium was unique to St. Thomas solution.
What drug is used to stop the heart during surgery?
The surgeon infuses a chemical agent (cardioplegia) which stops the heart’s function. The solution contains potassium ion which has a quieting effect on the heart.
How do you fix hyperkalemia?
Patients with hyperkalemia and characteristic ECG changes should be given intravenous calcium gluconate. Acutely lower potassium by giving intravenous insulin with glucose, a beta2 agonist by nebulizer, or both. Total body potassium should usually be lowered with sodium polystyrene sulfonate (Kayexalate).
What does hypercalcemia do to the heart?
Severe hypercalcemia can lead to confusion, dementia and coma, which can be fatal. Abnormal heart rhythm (arrhythmia). Hypercalcemia can affect the electrical impulses that regulate your heartbeat, causing your heart to beat irregularly.
What does hypokalemia do to the heart?
The most dangerous aspect of hypokalemia is the risk of ECG changes (QT prolongation, appearance of U waves that may mimic atrial flutter, T-wave flattening, or ST-segment depression) resulting in potentially lethal cardiac dysrhythmia.
How do you become a stone hearted person?
In order to become a stone heart person one needs to demolish these lies we tell ourselves and instead come up with rational beliefs which promise personal growth, success and peace in life.
What does a stone heart mean?
Definition of a heart of stone : an inflexible and unfriendly or unkind disposition She has a heart of stone.
Can you give calcium with digoxin?
Conclusion: Among digoxin-intoxicated humans, intravenous calcium does not seem to cause malignant dysrhythmias or increase mortality. We found no support for the historical belief that calcium administration is contraindicated in digoxin-toxic patients.
Is cardioplegia a drug?
Baxter Cardioplegia Solution A is a sterile, non-pyrogenic solution in a Viaflex bag. It is used to induce cardiac stasis and to protect the myocardium during open-heart surgery.
How do you ReVerse cardioplegia?
The ReVerse cardioplegia circuit system is a description of a two-pump cardioplegia circuit which is adaptable to either blood or crystalloid cardioplegia. The change from one mode to another requires a manoeuvre of two clamps, allowing the blood solution to travel through shunt tubing into the apposite pumphead.
What does it mean to be put on bypass?
Cardiopulmonary bypass (CPB) is a technique in which a machine temporarily takes over the function of the heart and lungs during surgery, maintaining the circulation of blood and the oxygen content of the patient’s body.
