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Within the common perfusion target range.
Vasoactive-Inotropic Score (VIS): Explanation and Clinical Context The Vasoactive-Inotropic Score (VIS) quantifies the amount of cardiovascular support a patient receives through vasoactive and inotropic medications. It was originally developed to assess post-operative outcomes in pediatric cardiac surgery, correlating higher scores with increased morbidity and mortality. The VIS is calculated as: VIS = dopamine (µg/
Oxygen Desaturation Index (ODI): Explanation and Clinical Context Oxygen Desaturation Index (ODI) quantifies the number of oxygen desaturation events per hour of sleep, typically defined as a ≥4% drop in oxygen saturation from baseline, lasting at least 10 seconds. It serves as a non-invasive and practical surrogate for the Apnea–Hypopnea Index (AHI) in evaluating sleep-disordered breathing (SDB). An elevated ODI ref
Left Atrial Volume Index (LAVI): Explanation and Clinical Context LAVI represents the left atrial volume indexed to body surface area and serves as a reliable marker of chronic diastolic burden. Enlargement of the left atrium occurs gradually as a consequence of prolonged elevation of left ventricular filling pressure. Because of this, LAVI is considered a structural biomarker that reflects chronic diastolic dysfunct
Sokolow–Lyon Index (SV1 + tallest R in V5 or V6): Explanation and Clinical Context The Sokolow–Lyon Index is a classic electrocardiographic voltage criterion for detecting left ventricular hypertrophy (LVH). It is calculated as the depth of the S wave in lead V1 plus the amplitude of the tallest R wave in lead V5 or V6 (measured in millimetres). A summed value > 35 mm (3.5 mV) is the conventional cut-off suggesting L
About Gensini Score: The Gensini Score is a quantitative angiographic tool used to assess the severity of coronary artery disease (CAD). It considers both the degree of luminal narrowing and the importance of the lesion's location in the coronary tree. Each degree of stenosis (1–25% = 1 point; 26–50% = 2; 51–75% = 4; 76–90% = 8; 91–99% = 16; 100% = 32) is multiplied by a weighting factor based on the anatomic segment
CHA₂DS₂-VASc Score: Explanation and Clinical Context The CHA₂DS₂-VASc Score is a validated clinical risk stratification tool used to estimate the annual risk of ischemic stroke in patients with atrial fibrillation (AF), particularly non-valvular AF. It refines the earlier CHADS₂ Score by incorporating additional risk factors—vascular disease, age 65–74 years, and female sex—to improve sensitivity in identifying patie
TIMI Risk Score for UA/NSTEMI: Comprehensive Explanation and Clinical Context The TIMI (Thrombolysis In Myocardial Infarction) Risk Score is a validated tool used to predict the likelihood of adverse cardiovascular outcomes (death, myocardial infarction, or urgent revascularization) within 14 days in patients with Unstable Angina (UA) or Non ST-Elevation Myocardial Infarction (NSTEMI). It consists of seven clinical p
Revised Cardiac Risk Index RCRI Explanation and Clinical Context The Revised Cardiac Risk Index is one of the most widely used bedside tools for estimating the probability of perioperative major adverse cardiac events in patients undergoing non cardiac surgery. The score was derived from a large cohort and validated in multiple populations. It relies on six predictors that represent structural cardiac disease, myocar
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