Pulmonary Vein (PV) Doppler Patterns

 

Pulmonary Vein (PV) Doppler Patterns – Normal and in Disease

Pulmonary vein Doppler is recorded using pulsed-wave Doppler (usually from apical 4-chamber view for right upper PV or by TEE). It reflects left atrial (LA) pressure and compliance, and is essential in diastology and mitral valve assessment.

━━━━━━━━━━━━━━━━━━

1. Normal Pulmonary Vein Doppler Pattern

Normal waveform has three components:

1️⃣ S wave (Systolic forward flow)

• Occurs during LV systole

• Blood flows from pulmonary veins → LA

• Normally S ≥ D in younger adults

• Reflects LA relaxation and descent of mitral annulus

2️⃣ D wave (Diastolic forward flow)

• Occurs during early LV diastole

• Corresponds to mitral E wave

• Reflects LA pressure and LV relaxation

3️⃣ Ar wave (Atrial reversal)

• Occurs during atrial contraction

• Small retrograde flow into pulmonary veins

• Normally:

Ar velocity < 35 cm/s

Ar duration < mitral A duration

👉 Normal Pattern: S wave dominant or equal to D

Small Ar reversal

━━━━━━━━━━━━━━━━━━

2. PV Doppler in Diastolic Dysfunction

Grade I (Impaired Relaxation)

• S wave > D wave (more systolic dominance)

• Normal or mildly increased Ar

Mechanism: Delayed LV relaxation, low early filling.

---

Grade II (Pseudonormal)

• S wave < D wave

• Increased Ar velocity

• Ar duration > mitral A duration

Mechanism: Elevated LA pressure.

👉 Clue: PV Doppler helps unmask pseudonormal mitral inflow.

---

Grade III/IV (Restrictive Filling)

• Markedly dominant D wave

• Blunted S wave

• Prominent Ar reversal

Mechanism: Severely elevated LA pressure and reduced compliance.

━━━━━━━━━━━━━━━━━━

3. Pulmonary Vein Doppler in Mitral Regurgitation (MR)

Mild MR

• Reduced S wave amplitude

Moderate MR

• Blunted S wave (S < D)

Severe MR

• Systolic flow reversal (retrograde flow in systole)

• Highly specific for severe MR

Mechanism: Regurgitant jet increases LA pressure in systole → reverses PV flow.

━━━━━━━━━━━━━━━━━━

4. Pulmonary Vein Doppler in Atrial Fibrillation

• No Ar wave (no organized atrial contraction)

• Variable S and D waves

• May show reduced systolic dominance

Important in estimating filling pressures.

━━━━━━━━━━━━━━━━━━

5. Constrictive Pericarditis

• Prominent respiratory variation in PV flow

• Marked decrease in D wave during inspiration

Helps differentiate from restrictive cardiomyopathy.

━━━━━━━━━━━━━━━━━━

6. Left Atrial Hypertension

Seen in: • Advanced diastolic dysfunction

• Severe MR

• LV systolic dysfunction

Pattern: • D wave dominance

• Increased Ar velocity

• Prolonged Ar duration

━━━━━━━━━━━━━━━━━━

Quick Summary Table

Normal

S ≥ D, small Ar

Impaired relaxation

S > D

Pseudonormal

S < D, ↑ Ar

Restrictive

D >>> S, prominent Ar

Severe MR

Systolic flow reversal

AF

No Ar wave

━━━━━━━━━━━━━━━━━━