Daily Cardiology Research Analysis
Analyzed 114 papers and selected 3 impactful papers.
Summary
Analyzed 114 papers and selected 3 impactful articles.
Selected Articles
1. Efficacy and safety of optical coherence tomography-guided versus angiography-guided percutaneous coronary intervention: a systematic review and meta-analysis.
Across 11 RCTs (n=6,432), OCT-guided PCI reduced cardiac death, MACE, and procedural complications compared with angiography guidance, while all-cause mortality was not significantly different (RR 0.72, 95% CI 0.51–1.01). Methodological rigor included PRISMA adherence and RoB 2.0 assessment.
Impact: This synthesis of randomized evidence indicates clinically meaningful benefits of OCT guidance for complex PCI, supporting broader adoption in cath lab workflows.
Clinical Implications: For complex coronary lesions, OCT guidance should be considered to minimize cardiac death, MACE, and procedural complications; centers should ensure OCT availability and operator proficiency while awaiting further data on long-term mortality.
Key Findings
- Included 11 RCTs with 6,432 participants following PRISMA and Cochrane RoB 2.0.
- OCT-guided PCI significantly reduced cardiac death and MACE versus angiography guidance.
- All-cause mortality did not reach statistical significance (RR 0.72, 95% CI 0.51–1.01).
- Procedural complications were significantly lower with OCT guidance.
Methodological Strengths
- PRISMA-compliant systematic search with explicit inclusion of RCTs
- Random-effects meta-analysis with Cochrane RoB 2.0 bias assessment
Limitations
- Heterogeneity in lesion complexity, OCT protocols, and operator expertise among trials
- Limited patient-level data and insufficient power for long-term mortality differences
Future Directions: Large-scale, patient-level meta-analyses and pragmatic RCTs comparing OCT, IVUS, and angiography in high-risk subsets are needed to define impacts on long-term mortality and cost-effectiveness.
BACKGROUND: The optimal imaging guidance for percutaneous coronary intervention (PCI) in complex coronary lesions remains a matter of debate. This meta-analysis compares the efficacy and safety of optical coherence tomography (OCT)-guided PCI versus angiography-guided PCI. METHODS: Following PRISMA guidelines, we systematically searched PubMed, Embase, Cochrane, and ClinicalTrials.gov from inception to December 2024. Randomized controlled trials (RCTs) comparing OCT-guided PCI to angiography-guided PCI were included. Data analysis was performed using RevMan 5.4, with risk ratios (RR) and 95% confidence intervals (CI) calculated for dichotomous outcomes using a random-effects model. Risk of bias was assessed using the Cochrane RoB 2.0 tool. RESULTS: Eleven RCTs involving 6432 participants were included. OCT-guided PCI showed no statistically significant reduction in all-cause mortality compared to angiography-guided PCI (RR 0.72, 95% CI 0.51-1.01, CONCLUSION: OCT-guided PCI demonstrated significant benefits in reducing cardiac death, MACE, and procedural complications compared to angiography-guided PCI. These findings support the integration of OCT in complex PCI, although further studies are warranted to assess its impact on long-term mortality.
2. Quantifying the impact of slice thickness on cardiovascular risk stratification in lung cancer screening: a multi-center "RESCUE" study.
Paired reconstructions across 2,914 patients showed that 10–19% with CAC=0 on 5-mm CT had CAC>0 on 1–2 mm reconstructions, mostly Agatston 1–99. Among symptomatic patients, 31% with CAC=0 on thick slices had obstructive CAD; thin-slice analysis reclassified many to CAC-positive. Thin-slice review improved sensitivity without extra radiation.
Impact: This work identifies a correctable, systematic source of false-negative CAC on routine chest CT and offers an immediately actionable change—review thin slices—to enhance subclinical atherosclerosis detection.
Clinical Implications: Radiology and cardiology services should incorporate thin-slice (1–2 mm) reconstructions when reporting CAC from non-gated chest CT to avoid false negatives and enable earlier preventive interventions.
Key Findings
- Reclassification from CAC=0 to CAC>0 occurred in 19.0% (1.0 mm) and 10.2% (2.0 mm) cohorts.
- Most reclassified cases (91–99%) had mild CAC (Agatston 1–99).
- 31% of symptomatic patients with CAC=0 on 5-mm CT had obstructive CAD (>50% stenosis).
- Risk categorization agreement was strong (weighted kappa 0.705–0.816); AI agreed with experts (r=0.956).
Methodological Strengths
- Paired thin- versus thick-slice analysis across multiple datasets with external validation
- Use of invasive angiography for reference in an internal cohort and strong AI–expert concordance
Limitations
- Predominantly reclassification to mild CAC without direct linkage to longitudinal outcomes
- Generalizability may vary with scanner protocols and reconstruction kernels
Future Directions: Prospective outcome studies should test whether thin-slice–enabled reclassification improves preventive therapy uptake and cardiovascular events; standardized opportunistic CAC pipelines can be evaluated across health systems.
BACKGROUND: Patients undergoing routine non-gated chest computed tomography (CT) for health checkups or atypical chest discomfort often present with a coronary artery calcium (CAC) score of zero on standard 5.0 mm reconstructions. We hypothesized that these thick slices obscure mild calcification due to partial volume effects (PVEs), which could be recovered by retrospective analysis of native thin-slice images. This study aimed to quantify the rate of unrecognized coronary calcification on standard thick-slice CT by comparing paired thin- and thick-slice reconstructions. METHODS: We analyzed data of 2,914 patients across four datasets: Stanford Coronary Calcium and chest CT's (COCA) (n=651) for reference validation; an internal cohort evaluated by invasive angiography for early-onset coronary artery disease (CAD) (n=766) and National Lung Screening Trial (NLST) (n=852) with paired thin (1.0-2.0 mm) RESULTS: In the internal cohort, 19.0% were reclassified from CAC =0 on 5.0 mm scans to CAC >0 on 1.0 mm scans. Similarly, 10.2% of NLST participants were reclassified using 2.0 mm scans. Most reclassified patients (91-99%) fell into the mild risk category (Agatston 1-99). Crucially, 31% of symptomatic patients with CAC =0 on standard scans had obstructive CAD (>50% stenosis); many were "rescued" to a positive CAC status by thin-slice analysis. Risk categorization showed strong agreement (weighted kappa 0.705-0.816). Artificial intelligence (AI) correlated strongly with expert annotations (r=0.956). CONCLUSIONS: Standard 5 mm reconstructions cause significant false negative CAC assessments. Analyzing routinely available thin slice reconstructions improves sensitivity for early subclinical atherosclerosis without additional radiation, supporting their use in opportunistic screening.
3. Influenza vaccination, incident atrial fibrillation, and cardiovascular outcomes.
In 276,888 matched adults with ~2.7 years of follow-up, influenza vaccination was associated with lower incident AF (HR 0.80) and reduced all-cause mortality, MI, incident HF, and cardiovascular hospitalization. Benefits were consistent across age and baseline CVD subgroups.
Impact: This real-world target-trial emulation provides compelling evidence that routine influenza vaccination may reduce incident AF and improve cardiovascular outcomes, informing prevention strategies while RCTs are pursued.
Clinical Implications: Encourage influenza vaccination in adults, especially those with CKM risk, as a potentially effective upstream AF and cardiovascular risk reduction measure; integrate vaccination status into AF prevention pathways.
Key Findings
- After 1:1 propensity matching (n=276,888), influenza vaccination was associated with lower incident AF (HR 0.80, 95% CI 0.76–0.84).
- Vaccination was linked to reduced all-cause mortality (HR 0.85), MI (HR 0.91), incident HF (HR 0.92), and cardiovascular hospitalization (HR 0.97).
- Associations were consistent across age strata and baseline CVD status without significant interaction.
Methodological Strengths
- Large-scale target-trial emulation with extensive propensity matching over 65 covariates
- Robust, domain-relevant outcomes with subgroup consistency analyses
Limitations
- Observational design susceptible to residual confounding and healthy-user bias
- Vaccination exposure based on recorded data may undercapture community vaccinations
Future Directions: Randomized trials powered for AF outcomes should test whether vaccination causally reduces AF; mechanistic studies on infection-triggered arrhythmogenesis and immune modulation are warranted.
BACKGROUND AND AIMS: Influenza infection triggers cardiovascular events, and vaccination confers cardiovascular benefit in high-risk populations. Its role in preventing incident atrial fibrillation (AF) and cardiovascular outcomes in clinical practice remains uncertain. These associations were evaluated using a real-world target-trial emulation framework. METHODS: A retrospective cohort study was conducted using the TriNetX Global Collaborative Federated Research Data Network including adults with a routine healthcare visit in 2022. Influenza vaccination within the preceding year defined exposure; comparators had no recorded vaccination. A 1:1 propensity score matching across 65 baseline variables was applied. Outcomes included incident AF, cardiovascular events, and mortality, with subgroup analyses by age and baseline cardiovascular disease. RESULTS: After matching, 276 888 patients (138 444 per group) were included with excellent covariate balance. During a mean follow-up of 2.7 ± 0.7 years, influenza vaccination was associated with a significantly lower risk of incident AF [hazard ratio (HR) 0.80, 95% confidence interval (CI) 0.76-0.84; P < .0001]. The absolute annualized incidence of AF was 0.9% in vaccinated patients vs 1.1% in non-vaccinated patients. Vaccinated patients also had lower risks of all-cause mortality (HR 0.85, 95% CI 0.82-0.89), myocardial infarction (HR 0.91, 95% CI 0.86-0.97), incident heart failure (HR 0.92, 95% CI 0.88-0.96), and cardiovascular-related hospitalization (HR 0.97, 95% CI 0.95-0.99). Associations were directionally consistent across age and cardiovascular disease subgroups, without significant effect modification. CONCLUSIONS: In a large retrospective observational real-world cohort, influenza vaccination was associated with lower risks of incident AF and multiple cardiovascular outcomes. These findings support vaccination as a potential upstream strategy for AF prevention and highlight the need for randomized trials specifically designed to address AF-related outcomes.