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ACC 2026 Late-Breaking Trials
Live trial results, expert commentary, and discussion with 10+ trial authors
Does surgical mitral valve replacement in rheumatic heart disease patients yield similar mortality outcomes compared to non-rheumatic patients and across different center volumes?
Result: One-year mortality did not differ between RHD (6.4%) and non-RHD (13.8%) MVR patients (HR: 0.80; 95% CI 0.53-1.21; p=0.288).

What are the mechanisms and clinical consequences of vertical transmission of Type B Coxsackieviruses from mother to infant?
Result: Vertical transmission of CV-B can occur through transplacental passage or inhalation during delivery, leading to serious consequences including abortion, stillbirth, congenital malformations, and severe neonatal morbidity and mortality.
Does the sequential delivery of M2a, M2b, and M2c immune cell-mimicking nanoparticles improve tissue repair in myocardial infarction?
Result: The sequential delivery of M2a, M2b, and M2c nanoparticles emerged as the most effective approach for promoting MI recovery among various delivery strategies tested.
Does higher depressive burden increase the odds of prevalent myocardial infarction in US adults?
Result: Every 1-point increase in PHQ-9 score corresponded to a 6.2% increase in the odds of MI (OR = 1.062, 95% CI: 1.047–1.077; p < 0.001).
Are circulating lipid and bile acid metabolites associated with future colorectal cancer risk?
Result: Fourteen metabolites were significantly associated with CRC risk (FDR < 0.05), including inverse associations for phospholipids and ether lipids (OR range 0.47-0.63, p-value range 6.2E-04 to 6.8E-13).
Does an educational session by specialized community health workers improve colorectal cancer genetic knowledge and prevention behaviors in Hispanic/Latine adults?
Result: Participants in the intervention arm had significantly greater improvements in cancer genetic knowledge compared to control (2.7 more correct answers, p<0.01; 3.25 fewer 'don't know' responses, p<0.01) at 6-12 weeks.
Does bromocriptine improve LVEF recovery and reduce mortality in patients with peripartum cardiomyopathy?
Result: Bromocriptine use was consistently associated with improved LVEF recovery (mean Δ +9–12%) and a 35–45% relative reduction in mortality compared with standard therapy alone.
Result: TFEB directly bound to the promoter region of Thbs1, markedly elevating its expression and reducing focal adhesion complex activation at the protein level.
Result: Immunohistochemistry plays a crucial role in interpreting a specific diagnosis or narrowing the differential diagnosis of SRCTs, and molecular genetic investigations are essential for cases with atypical or overlapping features.

Are specific pre-diagnostic circulating metabolites associated with the risk of developing liver cancer?
Result: Elevated aromatic amino acids, glutamate, arginine, and conjugated bile acids were positively associated with liver cancer risk (RRs 1.49 to 5.82), whereas branched-chain amino acids, lysine, glutamine, and lysophosphatidylcholines showed inverse associations (RRs 0.15 to 0.75).