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Peak TRV Risk Stratification Calculator (Echocardiography Pulmonary Hypertension Assessment)

Peak TRV Risk Stratification: Explanation and Clinical Context Peak tricuspid regurgitant velocity (TRV) is a key echocardiographic parameter used to estimate pulmonary artery systolic pressure (PASP) and assess the probability of pulmonary hypertension (PH). It is derived from continuous-wave Doppler measurement of the tricuspid regurgitation jet and incorporated into the simplified Bernoulli equation (ΔP = 4 × TRV²

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Pulmonary Arterial Compliance Index (PACi) Calculator

Pulmonary Arterial Compliance Index (PACi): Explanation and Clinical Context Pulmonary arterial compliance reflects the pulsatile component of right ventricular afterload, calculated as stroke volume divided by pulmonary arterial pulse pressure (sPAP − dPAP). Indexing to body surface area yields the Pulmonary Arterial Compliance Index (PACi): SVI/(sPAP − dPAP), expressed in mL·m-2 per mmHg. Compliance represents the

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Pulmonary Artery Diameter Enlargement Ratio (CT-based) Calculator

Ascending Aorta (AA) diameter — same slice/level (mm) Sex (for sex-specific mPA normal limits) -- choose -- Male Female Pulmonary Artery Diameter Enlargement Ratio (CT-based): Explanation and Clinical Context The pulmonary artery–to–ascending aorta diameter ratio (PA/Ao) is obtained from axial chest CT at the level of the main pulmonary artery bifurcation, measuring the short-axis diameters of the main PA and ascendi

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Pulmonary Hypertension in Left Heart Disease (PH-LHD) Differentiation Index

: Explanation and Clinical Context This calculator integrates non-invasive evidence to help differentiate pulmonary arterial hypertension (PAH) from PH due to left heart disease (PH-LHD). The H2FPEF score (Reddy et al., 2018) estimates HFpEF probability using atrial fibrillation (3), BMI >30 (2), ≥2 antihypertensives (1), age >60 (1), E/e' >9 (1), and PASP >35 (1). Scores ≥6 indicate a high likelihood of HFpEF, which

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Pulmonary Vascular Resistance (PVR) Risk Tier Calculator

Pulmonary Vascular Resistance (PVR) Risk Tier: Explanation and Clinical Context Pulmonary Vascular Resistance (PVR) represents the afterload faced by the right ventricle and is calculated from the transpulmonary gradient (mean pulmonary artery pressure minus pulmonary artery wedge pressure) divided by cardiac output. It reflects the degree of obstruction within the pulmonary vasculature, primarily from remodeling or

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Pulmonary Vasoreactivity Test Response Prediction Model (AVT Response Predictor)

Pulmonary Vasoreactivity Test Response Prediction Model: Explanation and Clinical Context This tool integrates a heuristic pre-test probability of a positive acute vasoreactivity test (AVT) response with established adult response criteria (Sitbon and Barst). Classic AVT response is defined by a ≥10 mmHg fall in mPAP to ≤40 mmHg without a drop in cardiac output (Sitbon), or ≥20% decrease in both mPAP and PVR with unc