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: Explanation and Clinical Context This calculator estimates the relative short-term increase in cardiovascular event risk during a work shift in hot environments using WBGT. It anchors risk to a pragmatic WBGT threshold and scales risk by exceedance, shift duration, and vulnerability (age, known CVD, and medications that may impair heat tolerance). The temperature–risk elasticity is based on meta-analytic evidence t
Heavy Metal Exposure Cardiac Toxicity Index (HM-CTI, Lead & Arsenic): Explanation and Clinical Context The HM-CTI is an evidence-informed, pragmatic index summarizing cardiovascular toxicity risk from two established environmental cardiotoxins: lead and inorganic arsenic. It uses two biomarkers—blood lead level (BLL, µg/dL) and urinary inorganic-related arsenic (iAs+MMA+DMA, µg/L)—to generate a 0–10 score, categorizi
High-G Cardiac Screening Index (Aviation): Explanation and Clinical Context What this calculator does. It implements the Cardiac Force Index (CFI) framework reported in military aircrew: CFI = body weight × activity ÷ heart rate. Using wearable-derived activity at rest and during comfortable walking, the tool outputs RCFI (rest), WCFI (walk), and the Cardiac Force Ratio (CFR = WCFI/RCFI) that summarizes reserve from