Esc Calculator Hcm Software

ESC HCM Risk Equation:

\[ Probability (\%) = 1 - 0.998^{\exp(Prognostic\ Index)} \] \[ Prognostic\ Index = 0.15939858 \times MWT - 0.00294271 \times MWT^2 + 0.0259082 \times LAS + 0.00446131 \times MLVOTG + 0.4583082 \times FHSCD + 0.82639195 \times NSVT + 0.71650361 \times US - 0.01799918 \times Age \]

MWT (mm):

LAS (mm):

MLVOTG (mm Hg):

mm Hg

FHSCD:

NSVT:

US:

Age (years):

years

5-Year SCD Risk Probability:

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1. What is the ESC HCM Risk Calculator?

The ESC HCM Risk Calculator estimates the 5-year risk of sudden cardiac death (SCD) in patients with hypertrophic cardiomyopathy (HCM) using the European Society of Cardiology (ESC) algorithm. It incorporates multiple clinical and echocardiographic variables.

2. How Does the Calculator Work?

The calculator uses the ESC HCM risk equation:

Where:

MWT — Maximum wall thickness (mm)
LAS — Left atrial size (mm)
MLVOTG — Maximum left ventricular outflow tract gradient (mm Hg)
FHSCD — Family history of sudden cardiac death (0 or 1)
NSVT — Non-sustained ventricular tachycardia (0 or 1)
US — Unexplained syncope (0 or 1)
Age — Patient age in years

3. Importance of SCD Risk Assessment

Details: Accurate SCD risk stratification is crucial for determining which HCM patients may benefit from implantable cardioverter-defibrillator (ICD) therapy.

4. Using the Calculator

Tips: Enter all required parameters. MWT, LAS, and MLVOTG should be from recent echocardiography. Binary variables (FHSCD, NSVT, US) should be coded as 0 (absent) or 1 (present).

5. Frequently Asked Questions (FAQ)

Q1: What is considered high risk?
A: Generally, ≥6% 5-year risk is considered high risk for SCD and may warrant ICD consideration.

Q2: How often should risk be reassessed?
A: Risk should be reassessed every 1-2 years or when new clinical data becomes available.

Q3: What are the limitations of this calculator?
A: Not validated in children, athletes, or patients with specific comorbidities. Clinical judgment remains essential.

Q4: How should NSVT be documented?
A: NSVT should be documented on Holter or other ambulatory monitoring (≥3 beats at ≥120 bpm).

Q5: What about other risk factors not included?
A: The calculator includes the major ESC-recommended risk factors. Other factors may be considered in clinical decision-making.