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[Myocardium protection using warm blood cardioplegia in corrective operation of tetralogy Fallot]
Insights
Warm blood cardioplegia, including terminal (TWBC) and continuous (CWBC) methods, offers superior myocardial preservation during corrective surgery for Tetralogy of Fallot compared to cold blood cardioplegia (CBC) or St. Thomas solution (CC). This leads to better cardiac function and reduced need for circulatory support post-operation.
Area of Science:
- Cardiology
- Cardiac Surgery
- Cardioplegia
Background:
- Pediatric cardiac surgery often requires myocardial protection strategies.
- Tetralogy of Fallot corrective surgery presents unique challenges for myocardial preservation.
Purpose of the Study:
- To compare the efficacy of different cardioplegia solutions in protecting the myocardium during corrective surgery for Tetralogy of Fallot in children.
- To evaluate the impact of various cardioplegia techniques on postoperative cardiac function and recovery.
Main Methods:
- Children undergoing Tetralogy of Fallot corrective surgery were divided into four groups based on cardioplegia type: St. Thomas (CC), cold blood (CBC), terminal warm blood (TWBC), and continuous warm blood (CWBC).
- Postoperative left ventricular contraction pressure, CK-Mb release, myocardial ATP levels, and CP values were measured.
- The need for inotropic drug support post-surgery was recorded.
Main Results:
- Terminal warm blood cardioplegia (TWBC) and continuous warm blood cardioplegia (CWBC) demonstrated significantly better myocardial preservation compared to St. Thomas (CC) and cold blood cardioplegia (CBC) (P < 0.05).
- Myocardial ATP levels were significantly higher in the TWBC and CWBC groups (17.1 and 18.2 mumol/g) compared to the CBC group (2.48 mumol/g) (P < 0.01).
- Fewer patients in the TWBC and CWBC groups required inotropic support post-operation (12%) compared to CC (37%) and CBC (16%) groups.
Conclusions:
- Warm blood cardioplegia (TWBC and CWBC) provides superior myocardial protection in pediatric Tetralogy of Fallot corrective surgery.
- These findings suggest that warm blood cardioplegia strategies are more effective in preserving myocardial function and improving postoperative outcomes.
Abstract:
In this paper, the children, who had undergone the operation with the approach similar to that of Tetralogy Fallot, were selected and divided into 4 groups, according to different kinds of cardioplegia were infused during corrective operation. St. Thomas group (CC group) 24 cases, cold blood cardioplegia group (CBC group) 21 cases, terminal warm blood cardioplegia group (TWBC group) 12 cases, and continuous warm blood cardioplegia group (CWBC group) 12 cases. Through the measurement of left ventricular contraction pressure and CK-Mb release in the postoperative period, the effect of myocardial preservation was better in TWBC and CWBC groups than in CC and CBC groups (P < 0.05), ATP volume of myocardium in TWBC and CWBC groups were higher (17.1 and 18.2 mumol/g) than that in CBC group (2.48 mumol/g) (P < 0.01) CP values were respectively 8.74 mumol/g, 7.63 mumol/g and 5.5 mumol/g (P < 0.05). 9 cases (37%) in CC group needed inotropic drug to assist circulation postoperation, 4 cases (16%) in CBC group, 2 cases (12%) in both TWBC and CWBC group. The results demonstrated that WBC had a better myocardial protection effect.