Canonical: https://echosuite.app/guides/diastolic-hcm/

# Diastolic assessment in hypertrophic cardiomyopathy

Explore the hypertrophic-cardiomyopathy diastolic pathway and its measurement and source context.

Created by [Mohammed Kamareddine, MD](https://echosuite.app/about/) · [Sources & educational scope](https://echosuite.app/about/)

[Open interactive calculator →](https://echosuite.app/calculators/#diastolic-hcm)

## Method

2025 ASE Table 7 · integrate E/e′, Ar−A, TR velocity and LAVi

Use the measurement units shown below. Some fields apply only to a selected method or condition; follow the interactive tool’s method choices. The interactive tool keeps missing measurements incomplete and provides its method-specific results and reference context.

## Measurements and acquisition

### Average E/e′

PW tissue Doppler at the mitral annulus

- Place the sample at the septal or lateral mitral annulus.
- Use tissue-Doppler settings and align with annular motion.
- Measure the early diastolic e′ peak and average representative beats.

### Pulmonary vein Ar − mitral A duration  ms

Spectral Doppler timing

- Use a sweep speed that clearly shows the interval boundaries.
- Measure from the specified onset to offset.
- Average representative beats using consistent rhythm handling.

### TR peak velocity  m/s

CW Doppler through the TR jet

- Search RV inflow, apical four-chamber, and subcostal windows; use the highest well-aligned signal.
- Trace the dense primary edge (‘chin’), not faint overgained noise, and reject truncated triangular envelopes when estimating pressure.
- Average three representative beats; in atrial fibrillation average 5–10 beats and exclude post-pause or post-ectopic velocities.

### LA volume index  mL/m²

Enter the measured value in the displayed unit

- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

## Sources and method context

American Society of Echocardiography · 2025 · Evaluation of Left Ventricular Diastolic Function and HFpEF Diagnosis · Table 7 p. 20 · HCM section p. 25

[Primary reference](https://www.asecho.org/wp-content/uploads/2025/07/Left-Ventricular-Diastolic-Function.pdf)

- HCM indicators · Table 7 · PDF p. 20

Average E/e′, Ar−A duration, TR velocity, and LAVi thresholds.

- Integrative interpretation · Section 15F · PDF p. 25

Requirement for comprehensive assessment rather than a single-variable diagnosis.

Catalogue review status: Exact guideline locator mapped · clinical sign-off pending

These pages describe the educational tool. Interpret measurements with the complete clinical context and the method’s acquisition limitations.

## Keep exploring

- [Apical four chamber acquisition guide](https://echosuite.app/guides/views/apical-four-chamber/) · [Open in Probe Lab](https://echosuite.app/#a4c)
- [Left atrial pressure calculator: E/e′ method](https://echosuite.app/guides/lap-ee/)
- [Left atrial pressure calculator: mitral regurgitation velocity](https://echosuite.app/guides/lap-mr/)
- [Left atrial volume index calculator: LAVI](https://echosuite.app/guides/la-size/)
- [Left ventricular pressure calculator](https://echosuite.app/guides/lv-pressure/)

[All echo guides](https://echosuite.app/guides/) · [Learning paths](https://echosuite.app/learn/)