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Calculator Explanation and Clinical Context This calculator provides noninvasive echocardiographic estimates that support interpretation of pulmonary artery pressures and pulmonary vascular resistance in clinical practice. Systolic pulmonary artery pressure is estimated from the peak tricuspid regurgitation velocity using the modified Bernoulli equation and an estimate of right atrial pressure. Use this estimate as o
LV Diastolic Stress Test Index: Explanation and Clinical Context The Left Ventricular (LV) Diastolic Stress Test Index, primarily expressed as the ratio of early mitral inflow velocity (E) to early diastolic annular velocity (e′) during peak exercise, is a validated echocardiographic parameter to assess left ventricular filling pressures under stress conditions. A normal response (E/e′ < 10) suggests adequate relaxat
LV End-Diastolic Volume Index (LVEDVI): Explanation and Clinical Context LV End-Diastolic Volume Index (LVEDVI) represents the volume of blood in the left ventricle at the end of diastole, normalized to body surface area (BSA). It is a fundamental echocardiographic parameter to assess left ventricular size and remodeling. In clinical practice, LVEDVI helps detect dilated cardiomyopathy, monitor heart failure progress
LV GLS Drop >15% Rule: Explanation and Clinical Context The LV GLS (Left Ventricular Global Longitudinal Strain) Drop >15% Rule is used for early detection of subclinical cardiotoxicity, particularly in patients receiving potentially cardiotoxic chemotherapy, such as anthracyclines or trastuzumab. GLS is a sensitive echocardiographic parameter reflecting myocardial deformation. A relative reduction of more than 15% f
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