Optimal delivery of cardioplegic solution for "redo" operations

Area of Science:

• Cardiac Surgery
• Cardiothoracic Surgery
• Cardiovascular Medicine

Background:

• Retrograde cardioplegia offers benefits in cardiac reoperations but traditional methods require extensive dissection.
• Dissection for coronary sinus intubation can disturb vein grafts or necessitate unnecessary surgical exposure.
• Antegrade cardioplegia carries risks of atheromatous embolization from diseased vein grafts.

Purpose of the Study:

• To optimize cardioplegic solution delivery during cardiac reoperations using a novel technique.
• To evaluate the safety and efficacy of "no touch" transatrial coronary sinus intubation for retrograde cardioplegia.
• To minimize cardiac dissection and protect diseased vein grafts during repeat cardiac surgeries.

Main Methods:

• A "no touch" transatrial technique for retrograde coronary sinus intubation was developed and applied in 63 patients.
• Cannulation involved minimal dissection of the aorta and right atrium, with blind advancement of the cannula into the coronary sinus.
• Successful placement was confirmed by a pressure waveform and transient balloon occlusion of the coronary sinus.

Main Results:

• All 63 patients (100%) successfully underwent "no touch" transatrial coronary sinus cannulation.
• The study reported two (3%) deaths, both due to hospital-acquired pneumonia, with no perioperative myocardial infarctions or heart block.
• Only 10% of patients required inotropic agents post-operatively, indicating good myocardial protection.

Conclusions:

• "No touch" transatrial retrograde cardioplegia provides optimal and simplified myocardial protection for cardiac reoperations.
• This technique allows for heart arrest before cardiac manipulations, reducing risks associated with dissection.
• It expands the utility of retrograde cardioplegia by eliminating the need for extensive cardiac dissection.