ECG criteria
- Voltage (any of the following features, 3 points): R or S wave in limb leads ≥20 mm, or S wave in V1 or V2 ≥30 mm, or R wave in V5 or V6 ≥30 mm
- Typical LV strain pattern (downsloping ST-segment depression and asymmetric T-wave inversion in lateral leads with a tall R wave, usually I, aVL, V5–V6) in the absence of digitalis: 3 points; the same pattern while taking digoxin/cardiac glycosides: 1 point
- P-terminal force in V1 (indicator of left atrial abnormality): terminal negative phase of the P wave in V1 >1 mm deep and >40 ms in duration (in some tables ≥1 mm and ≥40 ms due to rounding of measurements) — 3 points
- Left axis deviation of QRS (angle ≤ -30°) — 2 points
- QRS duration >90 ms (in some modern tables ≥90 ms) — 1 point
- Intrinsicoid deflection time in V5 or V6 ≥50 ms (in the absence of bundle branch block) — 1 point
- Summing the points: 5 or more — diagnostic LVH, 4 — probable LVH
What it looks like on ECG
The Romhilt-Estes criteria combine several independent ECG signs of left ventricular hypertrophy into a single scale.
| Sign | Leads | Score |
|---|---|---|
| R/S voltage ≥20 mm (limb leads) or S in V1/V2 ≥30 mm, or R in V5/V6 ≥30 mm | I, II, III, aVL, aVF, V1, V2, V5, V6 | 3 |
| Typical LV strain (ST depression, asymmetric T wave) without digoxin | V5–V6, I, aVL | 3 |
| Same pattern with digoxin | V5–V6, I, aVL | 1 |
| P-terminal force: negative P wave phase >1 mm × >40 ms | V1 | 3 |
| Left axis deviation ≤ -30° | From limb leads | 2 |
| QRS >90 ms | Any | 1 |
| Intrinsicoid deflection time in V5/V6 ≥50 ms | V5, V6 | 1 |
Points for each row are awarded at most once (the feature is either present or absent), and then summed. The LV strain pattern does not refer to any nonspecific ST-T changes, but specifically to downsloping ST depression with asymmetric T-wave inversion in leads with a tall R wave (typically I, aVL, V5–V6); points for this pattern and for the "on digoxin" variant are mutually exclusive. The P-wave sign in V1 reflects an electrical left atrial anomaly (P-terminal force) rather than proven anatomical atrial enlargement — morphological enlargement is confirmed by imaging. A total of 5 points and above is interpreted as LVH, 4 points as probable LVH, and less than 4 means LVH is not confirmed by this scale.
Mechanism
Left ventricular hypertrophy increases muscle mass, which enlarges the net depolarization vector toward the left leads — hence the increased amplitude of the R wave in V5–V6, I, aVL and the S wave in V1–V2. LVH may increase the activation time of the lateral LV wall; QRS duration sometimes increases, but often remains normal and depends on concomitant intraventricular conduction disturbances rather than wall thickness alone. Repolarization abnormalities of the hypertrophied myocardium ("systolic strain") produce downsloping ST depression and asymmetric negative T waves in lateral leads. Left atrial enlargement, frequently accompanying LVH in hypertension, may be reflected by the prolongation and deepening of the terminal phase of the P wave in V1 (P-terminal force), although this ECG sign is only an indirect marker and does not replace atrial imaging.
Causes
- Arterial hypertension (most common cause)
- Aortic stenosis and aortic regurgitation
- Hypertrophic cardiomyopathy
- Coarctation of the aorta
- Prolonged intense physical exertion (athletic heart, usually without ST-T strain)
- Combined valvular lesions with volume and/or systolic LV overload
Differential diagnosis
- Sokolow-Lyon index — S in V1 + R in V5 or V6 ≥35 mm (3.5 mV); R in aVL ≥11 mm may also be used separately. The scale is based solely on voltage, without points for P wave, electrical axis, or ST-T changes, and yields discrepancies with Romhilt-Estes in a subset of patients
- Cornell criteria — includes a voltage variant (R in aVL + S in V3, thresholds differ by sex) and the Cornell product: (R aVL + S V3) × QRS duration ≥2440 mm·ms, which takes into account both voltage and QRS duration
- Left bundle branch block — wide QRS and discordant ST-T mimic strain, and voltage-based LVH criteria are not valid in this case
- High QRS voltage in young and asthenic patients without true hypertrophy — an isolated voltage criterion without ST-T and P wave changes leads to overdiagnosis
- Hypertrophic cardiomyopathy — frequently produces more pronounced ST-T changes and pathological Q waves, differentiated by echocardiography
Clinical significance and management
The Romhilt-Estes scale is one of the tools for non-invasive LVH diagnosis, which is important for cardiovascular risk stratification: LVH is associated with an increased risk of arrhythmias, heart failure, and sudden death. With a score of 4–5 points or more, the physician should refer the patient for echocardiography to confirm and assess myocardial mass, wall thickness, and systolic function. The scale does not replace echocardiography and cardiac MRI: sensitivity is moderate (about 40–60%), specificity is often high (about 90–98% in validation studies), but both indicators depend significantly on the population, sex, age, body habitus, and the method used to confirm LVH. A negative ECG result does not rule out LVH, especially in patients with obesity or COPD, where voltage is reduced regardless of myocardial mass.
Common interpretation errors
- Omitting the ST-T segment and P wave, limiting the assessment to the voltage criterion only
- Awarding points for both ST-T "without digoxin" and "on digoxin" simultaneously — points for this row are mutually exclusive
- Applying the scale in the presence of left bundle branch block or significant intraventricular conduction disturbance, where voltage and ST-T criteria are uninformative
- Counting any nonspecific ST-T changes as a strain pattern, rather than the specific downsloping ST depression with asymmetric T-wave inversion in lateral leads
- Interpreting P-terminal force in V1 as proven anatomical left atrial enlargement, even though it is only an electrical sign of atrial abnormality
- Confusing the Romhilt-Estes criteria with the Sokolow-Lyon index when discussing cases with colleagues, as these are different scales with different thresholds
1. How many points on the Romhilt-Estes scale does an isolated voltage criterion (e.g., S in V1 ≥30 mm) yield without other features?
The voltage criterion is worth 3 points, which by itself is below the diagnostic threshold of 5 points.
2. What total Romhilt-Estes score is considered diagnostic for left ventricular hypertrophy?
5 points and above are diagnostic for LVH, while 4 points are interpreted only as probable LVH.
3. Why are the Romhilt-Estes criteria unreliable in left bundle branch block?
In left bundle branch block, the wide QRS and discordant ST-T are unrelated to true hypertrophy; therefore, voltage and repolarization criteria lose their meaning.
Frequently asked questions
How many Romhilt–Estes points are needed to diagnose LVH?
5 points or more are considered diagnostic for left ventricular hypertrophy, 4 points are interpreted as probable LVH, and less than 4 points means the criteria are not met.
How do the Romhilt–Estes criteria differ from the Sokolow–Lyon index?
The classic Sokolow–Lyon criterion is S in V1 + R in V5 or V6 ≥35 mm (R in aVL ≥11 mm may be used separately); this is a purely voltage-based scale. Romhilt–Estes is a comprehensive scale that takes into account voltage, ST-T, P-terminal force, QRS axis, QRS width, and intrinsicoid deflection time.
Can the scale be applied in left bundle branch block?
No, in left bundle branch block, the QRS and ST-T morphology are distorted by the block itself, so voltage and repolarization criteria lose their diagnostic value.
Is echocardiography necessary if a patient scores 5 points on the Romhilt–Estes scale?
Yes, echocardiography remains the method of choice for confirming LVH and assessing its severity, since the sensitivity of ECG scales is moderate and depends on body habitus and comorbid conditions.
Why does the scale take digoxin use into account?
Digoxin itself alters the ST-T segment, masking the typical pattern of LV overload; therefore, when a patient is taking it, only 1 point is awarded for a similar overload pattern instead of 3.
ECG Course
Interpretation from basics to myocardial infarction — learn to read any ECG using a systematic algorithm.
- Video lessons and theory for every topic
- Simulator case studies under every lesson
- Unlimited ECG simulator practice
- Study guide: "All ECGs in 25 minutes"
ECG Strip Simulator
ECG, radiology, histology, pathomorphology, pharmacology — thousands of flashcards with detailed explanations.
- Real ECG strips, not textbook drawings
- Instant answers and explanations
- Streaks and progress tracking in your dashboard
Related terms
More in the section «Hypertrophy and Chamber Enlargement»
Sources
- Surawicz B., Knilans T. Chou's Electrocardiography in Clinical Practice, 6th ed.
- Goldberger A.L. Clinical Electrocardiography: A Simplified Approach
- Orlov V.N. Guide to Electrocardiography
Educational material for medical students and physicians. Does not replace clinical guidelines and physical examination; the ECG must always be interpreted in conjunction with the clinical picture.