Normal & Abnormal Transmitral LV Inflow Patterns
Understanding Doppler signs of LV diastolic dysfunction is key for diagnosis & prognosis.
1️⃣ Normal Diastolic Function
- E/A >1, DT <220 ms
- Mechanism: Normal LV relaxation & compliance → early diastolic filling dominates (E wave).
🔵Clinical: Normal filling pressures. Seen in healthy individuals.
2️⃣ Mild Dysfunction (Impaired Relaxation)
- E/A <1, DT >220 ms
- Mechanism: LV relaxation is delayed → ↓E wave, compensatory ↑A wave.
🔵Clinical: Often asymptomatic; seen with aging, HTN. May progress if underlying cause persists.
Treatment: Control BP, optimize comorbidities to prevent worsening.
3️⃣ Moderate Dysfunction (Pseudonormal Pattern)
- E/A >1, DT 150–200 ms
- Mechanism: ↑LA pressure masks impaired LV relaxation, making E wave appear normal.
🔵Clinical: Filling pressures are elevated. Patients may have exertional dyspnea.
Trick: Use Tissue Doppler (e') or Valsalva to unmask.
Prognosis: Worsening diastolic dysfunction; requires intervention.
4️⃣ Severe Dysfunction ( Restrictive Filling)
- E/A >1.5, DT <150 ms
- Mechanism: Severely non-compliant LV; very high LA pressure → rapid, short early filling (↑↑E), minimal atrial contribution.
🔵Clinical: Seen in advanced heart failure, restrictive cardiomyopathy.
LV diastolic dysfunction is progressive. Doppler patterns evolve from impaired relaxation → pseudonormal → restrictive.
Recognizing these stages helps in early intervention and improving outcomes.
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