1,329 calculators and references across 60 specialties, with formula confidence shown up front.
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
Left Ventricular Mass Index (LVMI): Explanation and Clinical Context Left ventricular mass index is a key echocardiographic parameter used to quantify the extent of cardiac structural remodeling associated with pressure or volume overload. The Devereux formula is the most validated method for estimating left ventricular mass using linear measurements obtained from parasternal long axis imaging. The resulting left ven
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