JEWJITSU PEPTIDES: Three new primary-source reports on heart failure hemodynamics, thymic tolerance, and peptide-array serology

Study 1 reports on ambulatory patients with heart failure and reduced left ventricular ejection fraction who underwent right heart catheterization. Among 618 consecutive patients (mean age 52.5 years, 78% male), a low cardiac output state (LCOS), defined as cardiac index < 1.8 L/min/m2, was present in 116 patients (19%). Patients with LCOS had more advanced symptoms, lower systolic blood pressure and LVEF, higher NT‑proBNP, and were less likely to be receiving renin–angiotensin system inhibitors (RASi). The absence of RASi was strongly associated with LCOS (odds ratio 2.34).

The same heart‑failure report noted that liver function markers tended to be higher in patients with LCOS while renal function was similar across groups. Over a median follow‑up of five years, LCOS was independently associated with mortality after adjustment for age, sex, and advanced therapy (reported hazard ratio 1.86). These are observational associations in a referred advanced‑HF cohort; the paper describes prevalence and prognostic associations but does not establish causality or imply treatment guidance.

Study limitations reported or implied include the selected population referred for advanced assessment, which may limit generalizability to broader ambulatory heart‑failure populations, and the observational nature of associations between LCOS, medication use, biomarkers, and outcomes. The study documents hemodynamic phenotype characteristics and prognostic links that merit further prospective and mechanistic work.