Daily Cardiology Research Analysis

IMPORTANCE: There is uncertainty about the effects of sodium-glucose cotransporter 2 (SGLT2) inhibitors in participants with chronic kidney disease, with guidelines offering different strengths of recommendation based on diabetes status and urine albumin to creatinine ratio (UACR). OBJECTIVE: To assess the relative and absolute effects of SGLT2 inhibitor use across efficacy and serious safety outcomes in participants stratified by diabetes status and UACR (≥200 mg/g or <200 mg/g). DATA SOURCES AND STUDY SELECTION: Included 8 randomized clinical trials that studied an SGLT2 inhibitor with a label indication for use in kidney disease and recorded longitudinal kidney outcomes and baseline data on albuminuria. DATA EXTRACTION AND SYNTHESIS: Data were combined using inverse variance-weighted meta-analysis; group-specific absolute effects were estimated by applying relevant relative risks to the event rates of the placebo groups. MAIN OUTCOMES AND MEASURES: Assessed the effects of SGLT2 inhibitor use on clinical efficacy and safety outcomes. Heterogeneity by baseline level of UACR was assessed separately by diabetes status. RESULTS: A total of 58 816 participants (mean age, 64 [SD, 10] years; 35% were female; 48 946 with diabetes and 9870 without diabetes) were included from trials comparing an SGLT2 inhibitor vs placebo. Allocation to an SGLT2 inhibitor produced a lower rate of kidney disease progression (33 vs 48 for placebo per 1000 patient-years; hazard ratio [HR], 0.65 [95% CI, 0.60-0.70] in those with diabetes and 32 vs 46 per 1000; HR, 0.74 [95% CI, 0.63-0.85] in those without diabetes), a lower rate of acute kidney injury (14 vs 18 per 1000 [HR, 0.77; 95% CI, 0.69-0.87] with diabetes and 13 vs 18 per 1000 [HR, 0.72; 95% CI, 0.56-0.92] without diabetes), a lower rate of any hospitalization (202 vs 231 per 1000 [HR, 0.90; 95% CI, 0.87-0.92] with diabetes and 203 vs 237 per 1000 [HR, 0.89; 95% CI, 0.83-0.95] without diabetes), and a lower rate of any death (42 vs 47 per 1000 [HR, 0.86; 95% CI, 0.80-0.91] with diabetes and 42 vs 48 per 1000 [HR, 0.91; 95% CI, 0.78-1.05] without diabetes). Diabetes-specific HRs were similar in participants (with a UACR ≥200 mg/g vs with a UACR <200 mg/g) considered separately. Higher absolute risk at a UACR of 200 mg/g or greater meant larger estimated absolute benefits on kidney disease progression were evident in this subgroup. Clear absolute benefits were evident for other efficacy outcomes, and particularly hospitalization, in participants with a UACR less than 200 mg/g. Net absolute benefits remained in the analyses of non-heart failure populations and when estimated glomerular filtration rate was less than 60 mL/min/1.73 m2. CONCLUSIONS AND RELEVANCE: Within the studied participants, there were clear absolute benefits of SGLT2 inhibitors on kidney, hospitalization, and mortality outcomes irrespective of diabetes status and level of UACR.

BACKGROUND: Current guidelines recommend a stepwise strategy to achieve low-density lipoprotein cholesterol (LDL-C) goals after acute coronary syndrome (ACS). Earlier intensive strategies based on a combination of lipid-lowering therapies (LLTs) could be useful from the onset of ACS. However, the role of bempedoic acid in ACS, particularly when combined with high-intensity statins and ezetimibe, remains uncertain. The aim of ES-BempeDACS (Efficacy and Security of Bempedoic Acid in Acute Coronary Syndrome) was to compare the efficacy and safety of triple LLT (high-dose, high-intensity statin+ezetimibe+bempedoic acid) versus standard of care (high-dose, high-intensity statin+ezetimibe) after ACS. METHODS: ES-BempeDACS is a multicenter, independent, pragmatic, prospective, randomized, open, blinded end point controlled trial conducted in 12 Spanish hospitals between November 2023 and October 2024. The primary end point was the proportion of patients achieving LDL-C <55 mg/dL (<1.4 mmol/L) at 8 weeks after ACS, comparing triple LLT with standard of care. RESULTS: A total of 206 patients (59.5±10.9 years of age [mean±SD]; 21.4% women) were randomized within the first 72 hours of ACS to triple LLT or standard therapy of high-intensity statin+ezetimibe (ie, dual LLT). The baseline LDL-C level was 133.6±28.8 mg/dL. After 8 weeks, the LDL-C level was reduced to <55 mg/dL in 59.4% of patients in the triple LLT group compared with 53.1% in the control group (dual LLT; CONCLUSION: Both dual and triple LLT after ACS allow for high rates (>50%) of adequate LDL-C control (<55 mg/dL) at 8 weeks. Adding bempedoic acid to statin-ezetimibe therapy in the setting of ACS is safe but failed to improve the percentage of patients achieving the LDL-C goal (<55 mg/dL) at 8 weeks. Larger, randomized studies are needed to confirm our findings. REGISTRATION: URL: https://www.clinicaltrialsregister.eu; Unique identifier: 2021-006550-31.

BACKGROUND: FHF (fibroblast growth factor homologous factor) variants associate with arrhythmias. Although FHFs are best characterized as regulators of voltage-gated sodium channel (VGSC) gating, recent studies suggest broader, non-VGSC-related functions, including regulation of Cx43 (connexin 43) gap junctions and hemichannels, mechanisms that have generally been understudied or disregarded. METHODS: We assessed cardiac conduction and cardiomyocyte action potentials in mice with constitutive cardiac-specific RESULTS: FGF13 ablation prolonged the QRS and QT intervals. Carbenoxolone, a Cx43 gap junction uncoupler, markedly prolonged the QRS duration, leading to conduction system block in c CONCLUSIONS: FGF13 regulates microtubule-dependent trafficking and targeting of Cx43 and impacts cardiac impulse propagation via VGSC-independent mechanisms.