1,329 calculators and references across 60 specialties, with formula confidence shown up front.
LVOT Gradient Severity Index: Explanation and Clinical Context The LVOT Gradient Severity Index is a composite tool used to assess the severity of left ventricular outflow tract (LVOT) obstruction in patients, especially those with hypertrophic cardiomyopathy. It incorporates peak LVOT gradient, NYHA functional class, and presence of syncope to stratify patients into mild, moderate, or severe obstruction risk. This i
LVOT VTI (Stroke Volume) Estimation: Explanation and Clinical Context The LVOT VTI (Left Ventricular Outflow Tract Velocity Time Integral) combined with the LVOT diameter allows estimation of stroke volume (SV) by calculating the LVOT cross-sectional area and multiplying it by the VTI. Stroke volume represents the volume of blood ejected from the left ventricle during a single cardiac cycle. Accurate estimation is im
Lyme Carditis AV Block Risk Score: Explanation and Clinical Context The Lyme Carditis Suspicious Index (LCI)—also referred to as the Lyme Carditis AV Block Risk Score—was developed by Besant et al. (Circulation: Arrhythmia and Electrophysiology, 2018) to identify patients with high-grade atrioventricular (AV) block secondary to Lyme carditis. The tool assists clinicians in differentiating reversible Lyme carditis fro
Lysholm Knee Score Explanation and Clinical Context The Lysholm Knee Score is a validated clinical instrument created to evaluate knee function especially following ligament injury and reconstruction. It measures key functional dimensions that patients commonly experience including limp pain instability swelling mechanical symptoms stair climbing ability and squatting capability. The structure of this scoring system