Left posterior fascicular block electrocardiogram: Difference between revisions
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
== Overview == | == Overview == | ||
The electrocardiogram findings in left posterior fascicular block include right axis deviation of the QRS complex, wide QRS complexes and a S1Q3 pattern. | |||
== Electrocardiogram == | == Electrocardiogram == | ||
The diagnosis is often made in the context of previous ECGs. The frontal QRS axis is rightward and there are no other potential causes of [[right axis deviation]] such as [[right ventricular hypertrophy]] and prior lateral [[myocardial infarction]]. | The diagnosis is often made in the context of previous ECGs. The frontal QRS axis is rightward and there are no other potential causes of [[right axis deviation]] such as [[right ventricular hypertrophy]] and prior lateral [[myocardial infarction]]. | ||
| Line 11: | Line 13: | ||
* qR in II, III, and aVF | * qR in II, III, and aVF | ||
==EKG | ==EKG Examples== | ||
The EKG below shows sinus rhythm, with a some what wide QRS and a [[right axis deviation]]. The S1 Q3 pattern suggest an isolated left posterior fasicular block. One should also consider [[right ventricular hypertrophy]] but there is no sign of right atrial abnormality, and his echocardiogram was normal. | The EKG below shows sinus rhythm, with a some what wide QRS and a [[right axis deviation]]. The S1 Q3 pattern suggest an isolated left posterior fasicular block. One should also consider [[right ventricular hypertrophy]] but there is no sign of right atrial abnormality, and his echocardiogram was normal. | ||
[[File:Left posterior fascicular block1.jpg|center|500px]] | [[File:Left posterior fascicular block1.jpg|center|500px]] | ||
---- | ---- | ||
== References == | == References == | ||
{{reflist|2}} | {{reflist|2}} | ||
[[Category:Electrophysiology]] | [[Category:Electrophysiology]] | ||
[[Category:Cardiology]] | [[Category:Cardiology]] | ||
{{WH}} | {{WH}} | ||
{{WS}} | {{WS}} | ||
Revision as of 14:58, 24 October 2012
|
Left posterior fascicular block Microchapters |
|
Differentiating Left posterior fascicular block from other Diseases |
|---|
|
Diagnosis |
|
Treatment |
|
Case Studies |
|
Left posterior fascicular block electrocardiogram On the Web |
|
American Roentgen Ray Society Images of Left posterior fascicular block electrocardiogram |
|
Left posterior fascicular block electrocardiogram in the news |
|
Directions to Hospitals Treating Left posterior fascicular block |
|
Risk calculators and risk factors for Left posterior fascicular block electrocardiogram |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
The electrocardiogram findings in left posterior fascicular block include right axis deviation of the QRS complex, wide QRS complexes and a S1Q3 pattern.
Electrocardiogram
The diagnosis is often made in the context of previous ECGs. The frontal QRS axis is rightward and there are no other potential causes of right axis deviation such as right ventricular hypertrophy and prior lateral myocardial infarction.
- QRS axis of 100 to 180 degrees
- QRS duration 80-100 msec (usually normal or slightly widened qRS complex)
- Deep S in lead I and aVL (rS in I and aVL)
- qR in II, III, and aVF
EKG Examples
The EKG below shows sinus rhythm, with a some what wide QRS and a right axis deviation. The S1 Q3 pattern suggest an isolated left posterior fasicular block. One should also consider right ventricular hypertrophy but there is no sign of right atrial abnormality, and his echocardiogram was normal.
