Interpret this ECG and management

Reading File

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Finding Sources

Reading File

Finding Sources

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Finding Sources

I now have a thorough understanding of this ECG and the supporting textbook material. Let me provide a complete interpretation.

ECG Interpretation

Patient / Machine Data (from the report strip)

HR: 65 bpm
PR: 134 ms (normal)
QRS: 92 ms (normal, < 120 ms)
QTC: 420/42s ms (borderline normal)
P/QRS/T axis: 76/52/?
RV5/SV1: 4.622 mV - this is strikingly elevated
RV5+SV1: 4.622 mV
Machine interpretation mentions: Sinus rhythm, possible LVH, Left ventricular strain, Widespread ST changes

Systematic ECG Analysis

1. Rhythm

Regular sinus rhythm at 65 bpm
Normal PR interval (134 ms) - normal AV conduction
P waves present and upright in leads I, II, aVF - normal sinus origin

2. Axis

QRS axis ~52° - normal axis

3. Intervals

PR: 134 ms - normal
QRS: 92 ms - narrow, no bundle branch block
QTc: ~420 ms - upper limit of normal

4. Voltage (LVH Criteria)

Looking at the ECG, the precordial voltages are dramatically elevated:

RV5 + SV1 = 4.622 mV (46.22 mm) - far exceeds the Sokolow-Lyon threshold of 35 mm (3.5 mV)
Cornell criterion: SV3 + RaVL > 2.8 mV in men, > 2.0 mV in women - also likely met given the overall voltage
The tall R waves in V4-V6 and deep S waves in V1-V3 are visually consistent with this

This satisfies Left Ventricular Hypertrophy (LVH) by Sokolow-Lyon voltage criteria.

5. Repolarization - ST/T Changes (LV Strain Pattern)

This is the most clinically significant finding on this ECG:

Asymmetric ST depression with T-wave inversion visible in the lateral leads (I, aVL, V4-V6)
In leads with the tallest R waves, there is downsloping ST depression followed by T-wave inversion
This is the classic "LV strain pattern" (previously called secondary repolarization abnormality)

As Harrison's (22E) states: "Repolarization abnormalities (ST depression with T-wave inversions, formerly called the left ventricular 'strain' pattern) may appear in leads with prominent R waves."

Compare with the textbook LVH ECG above - the pattern on this patient's tracing is virtually identical: massive precordial voltages with lateral lead ST depression and T inversion.

6. Delta Waves / Pre-excitation No delta waves. PR interval is normal. No WPW pattern.

7. No evidence of:

Acute MI / STEMI (no primary ST elevation in a coronary distribution)
Bundle branch block (QRS < 100 ms)
Atrial fibrillation
Pathological Q waves

Final ECG Diagnosis

Sinus rhythm with Left Ventricular Hypertrophy (Sokolow-Lyon criteria: RV5+SV1 = 46.2 mm) with LV Strain Pattern (secondary ST-T changes in lateral leads)

The annotation on the ECG reads "Valsalva, Hgt: 113 mg/dl" - suggesting this patient has a known elevated blood sugar (possibly a diabetic/hypertensive patient in cardiac OPD).

Clinical Significance

LVH with strain pattern carries important prognostic implications:

It is a marker of hypertensive end-organ damage (target organ involvement)
It increases risk of cardiovascular morbidity, HF, arrhythmia, and sudden cardiac death
LVH on ECG reclassifies a hypertensive patient to higher cardiovascular risk regardless of blood pressure alone
The strain pattern (vs. pure voltage LVH) indicates more advanced myocardial remodeling

As Goldman-Cecil Medicine states: "ECG evidence for left ventricular hypertrophy is a major noninvasive marker of increased risk of cardiovascular morbidity and mortality rates, including sudden cardiac death."

Management

Immediate Workup

Investigation	Purpose
Echocardiogram (2D Echo)	Confirm LVH, measure LV wall thickness and mass, assess EF, diastolic function (LVH often → HFpEF)
Renal function (serum creatinine, eGFR, urine albumin:creatinine)	Assess coexisting renal target organ damage
Fasting lipid profile + HbA1c	Given blood glucose finding; risk stratification
Chest X-ray	Cardiomegaly, pulmonary congestion
Fundoscopy	Hypertensive retinopathy
24-hour ambulatory BP monitoring (ABPM)	If not already done; excludes white coat, confirms sustained hypertension

Blood Pressure Management (Priority)

Target BP: < 130/80 mmHg (or < 120/80 if tolerated) in patients with hypertensive heart disease/LVH.

Drug class selection - preferred agents that cause LVH regression:

ARBs or ACE inhibitors (first-line) - most evidence for LVH regression (LIFE trial showed losartan superior to atenolol for LVH regression and CV outcomes)
Calcium channel blockers (CCBs) - amlodipine is effective and well tolerated; useful as add-on
Thiazide-like diuretics (indapamide > hydrochlorothiazide) - useful as combination therapy

Avoid beta-blockers as monotherapy for hypertension with LVH unless there is a compelling indication (HFrEF, angina, post-MI) - the LIFE trial showed atenolol was inferior to losartan for LVH regression and mortality in hypertensives with ECG-LVH.

Lifestyle Modifications

Dietary sodium restriction (< 2 g/day)
Weight reduction if overweight
Regular aerobic exercise (30 min/day, 5 days/week)
Alcohol restriction
Smoking cessation

Follow-up

Repeat ECG at 6-12 months to assess for LVH regression
Repeat echo in 12 months
Monitor BP at every visit
Strict glycemic control given elevated blood sugar

Summary Table

Feature	Finding
Rhythm	Sinus, 65 bpm
PR/QRS	Normal (134 ms / 92 ms)
Axis	Normal (~52°)
Voltage	Markedly elevated - LVH (RV5+SV1 = 46 mm)
ST-T	LV Strain pattern - lateral ST depression + T inversion
Diagnosis	LVH with strain - hypertensive heart disease
Key risk	End-organ damage; increased CV morbidity/mortality
Management	Echo, renal/metabolic workup, ARB/ACEI + CCB, target BP < 130/80

Harrison's Principles of Internal Medicine 22E, p. 1367-1368
Goldman-Cecil Medicine, p. 428 (Chamber Hypertrophy, Repolarization Abnormalities)

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