Mitral regurgitation electrocardiogram: Difference between revisions
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==Electrocardiogram== | ==Electrocardiogram== | ||
===Left Atrial Enlargement=== | ===Left Atrial Enlargement=== | ||
ECG findings suggestive of [[left atrial enlargement]] include: | ECG findings suggestive of [[left atrial enlargement]] include:<ref name="pmid2861980">{{cite journal |vauthors=Murphy PJ |title=Searching in the dark |journal=Drug Metab. Dispos. |volume=13 |issue=3 |pages=269–71 |date=1985 |pmid=2861980 |doi= |url=}}</ref><ref name="isbn0-7637-6405-1">{{cite book |author=O'Keefe, James |title=The Complete Guide to ECGS |publisher=Jones & Bartlett Pub |location= |year=2008 |pages= |isbn=0-7637-6405-1 |oclc= |doi= |accessdate=}}</ref> | ||
* Broad, bifid [[P wave]] in lead II ('''P mitrale''') | * Broad, bifid [[P wave]] in lead II ('''P mitrale''') | ||
* Enlargement of the terminal negative portion of the P wave in VI. | * Enlargement of the terminal negative portion of the P wave in VI. | ||
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*qR complex in V1 | *qR complex in V1 | ||
*Right ventricular strain pattern: [[ST segment]] and [[T wave]] inversion in V1-V3 and occasionally in inferior leads (II, III, AVF) | *Right ventricular strain pattern: [[ST segment]] and [[T wave]] inversion in V1-V3 and occasionally in inferior leads (II, III, AVF) | ||
*[[Right bundle branch block]]: [[QRS]] duration> 0.12 seconds, rSR' in leads V1 & V2, wide slurred [[S wave]]s in lateral leads (V5, V6, I) | *[[Right bundle branch block]]: [[QRS]] duration> 0.12 seconds, rSR' in leads V1 & V2, wide slurred [[S wave]]s in lateral leads (V5, V6, I) | ||
===Atrial Fibrillation=== | ===Atrial Fibrillation=== | ||
Latest revision as of 15:44, 23 January 2020
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mohammed A. Sbeih, M.D.[2]; Rim Halaby, M.D. [3]
Overview
In severe cases of chronic mitral regurgitation (MR), signs of left ventricular hypertrophy with strain, left atrial enlargement, and pulmonary hypertension may be observed on the resting electrocardiogram (ECG). Chronic mitral regurgitation is associated with an increased risk for atrial fibrillation. The ECG may reveal findings of coronary artery disease or other cardiac conditions that might have led to MR.
Electrocardiogram
Left Atrial Enlargement
ECG findings suggestive of left atrial enlargement include:[1][2]
- Broad, bifid P wave in lead II (P mitrale)
- Enlargement of the terminal negative portion of the P wave in VI.
- P wave amplitude >2.5mm in inferior leads (II, III, AVF) or >1.5mm in V1/V2 (P pulmonale)
Shown below is an ECG depicting the following in lead II:
Shown below is an ECG depicting the following in lead V1:
- Biphasic P wave with terminal negative portion > 40 ms duration
- Biphasic P wave with terminal negative portion > 1mm deep
Left Ventricular Enlargement
Left ventricular enlargement is associated with an increased QRS voltage on ECG and a strain pattern or inverted check mark pattern to the T wave in the lateral leads.
Pulmonary Hypertension
ECG findings suggestive of pulmonary hypertension include:
- Right axis deviation
- R/S ratio > 1 in V1
- R wave > 7mm in V1
- rSR' complex in V1 with R' > 10mm
- qR complex in V1
- Right ventricular strain pattern: ST segment and T wave inversion in V1-V3 and occasionally in inferior leads (II, III, AVF)
- Right bundle branch block: QRS duration> 0.12 seconds, rSR' in leads V1 & V2, wide slurred S waves in lateral leads (V5, V6, I)
Atrial Fibrillation
Atrial fibrillation is commonly seen with mitral regurgitation: This is identified as an irregularly irregular rhythm with absence P waves.