Loading, please wait...
.webp&w=384&q=75){kind=logo}
Verifying...
Loading, please wait...
"Wherever the art of Medicine is loved, there is also a love of Humanity."
Hippocrates
Tetralogy of Fallot (ToF) remains the leading cause of cyanotic congenital heart disease worldwide. Surgeons aim for definitive repair, but pulmonary regurgitation (PR) often complicates the postoperative period. Predicting which patients will suffer from significant PR helps in surgical planning. Recent research highlights the utility of the pulmonary valve annulus z-score as a powerful predictive tool.
A retrospective study in Indonesia evaluated 101 pediatric patients undergoing ToF repair. The researchers utilized multislice computed tomography (MSCT) to measure preoperative pulmonary valve annulus (PVA) diameters. Furthermore, they assessed early PR using echocardiography within 45 days after the operation. Notably, both the maximal and minimal diameter z-scores showed a strong correlation with moderate or greater PR.
The study identified a critical threshold for clinical decision-making. Specifically, a maximal PVA diameter z-score lower than -2.62 predicted a higher risk of significant early PR. Consequently, clinicians can use this MSCT-derived metric to identify high-risk candidates. Moreover, this standardized approach addresses the variability seen in previous studies regarding optimal cut-off values.
Therefore, integrating MSCT-based measurements into preoperative protocols offers better prognostic clarity. This data allows surgical teams to refine their techniques, such as considering valve-sparing approaches where appropriate. Additionally, these findings provide a localized benchmark for populations with similar demographic profiles.
MSCT provides high-resolution, three-dimensional measurements of the minimal and maximal diameters of the valve. This precision allows for accurate z-score calculation, which is more detailed than standard echocardiography in complex cases.
A maximal pulmonary valve annulus z-score below -2.62 indicates significant hypoplasia. This finding serves as a strong predictor that the patient may experience moderate or greater pulmonary regurgitation shortly after surgical repair.
Disclaimer: This content is for informational and educational purposes only... Refer to the latest local and national guidelines for clinical practice.
References
Busro PW et al. Preoperative pulmonary valve annulus diameter z score as a predictor of pulmonary regurgitation after tetralogy of Fallot repair: a retrospective cohort study. J Cardiothorac Surg. 2026 Jun 04. doi: 10.1186/s13019-026-04323-2. PMID: 42243828.
Sathanandam S, et al. Management of Tetralogy of Fallot with Pulmonary Atresia. Pediatric Cardiology. 2023.
Predictive Value of Pulmonary Valve Annulus Z-Score for Valve Sparing in Tetralogy of Fallot Repair: A Systematic Review and Meta-Analysis. medRxiv. 2026.
"
Link will be sent via SMS to your number.
A study shows that preoperative MSCT-derived pulmonary valve annulus z-scores, specifically below -2.62, predict early PR after Tetralogy of Fallot repair....
2 weeks back
A recent retrospective study explores the efficacy of teprotumumab in thyroid eye disease (TED) patients with prolonged disease duration (median 42.3 months) and high clinical activity scores (CAS ≥ 4), showing significant improvements in proptosis and disease activity despite the chronic nature of the condition.
Today
This multiomics study reveals region-specific variations in the molecular composition of human milk fat globule membrane (HMFGM) proteins and their N-glycoprotein derivatives across China, highlighting the impact of regional diversity on breast milk composition.
Today
This review explores auxetic stents, which use a negative Poisson’s ratio to eliminate foreshortening and improve conformability, offering a structural solution to common stenting failures like restenosis and thrombosis in vascular diseases.
Today
A new study validates a 3D method for estimating the femoral head center using trochanteric landmarks in DDH patients. With an error margin of only 2-3 mm, this technique offers a superior alternative to pelvic-based methods for total hip arthroplasty planning.
Today
Explore the potential of algae as a superior meat alternative. This review highlights their high protein content (up to 70%), complete amino acids, and low environmental impact, making them a potent option for patient nutrition and sustainable diets.
Today