Left posterior fascicular block: Difference between revisions
m (Rossdonaldson1 moved page LPFB to Left Posterior Fascicular Block) |
No edit summary |
||
| (11 intermediate revisions by 7 users not shown) | |||
| Line 1: | Line 1: | ||
[[File:hemiblocks.png|thumb|His-Purkinje system and hemiblocks]] | |||
#Right axis deviation (>110) | |||
# | ==Criteria== | ||
#Exclude other causes (COPD, RVH, | Diagnostic criteria include<ref>Surawicz B, et al. AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: part III: intraventricular conduction disturbances. Journal of the American College of Cardiology. 2009; 53(11): 976–981.</ref>: | ||
#Right axis deviation (>110) | |||
#QRS < 120ms | |||
#qR in III and aVF | |||
#rS in I and aVL | |||
===LAFB vs LPFB<ref>Mattu A and Brady WJ. ECG's for the Emergency Physician. BMJ Books. Sep 19, 2003.</ref>=== | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|''''' | |||
| align="center" style="background:#f0f0f0;"|'''LAFB''' | |||
| align="center" style="background:#f0f0f0;"|'''LPFB''' | |||
|- | |||
| Axis||Left axis deviation||Right axis deviation | |||
|- | |||
| I and aVL||Upright QRS||Downgoing QRS | |||
|- | |||
| III||Downgoing QRS||Upright QRS | |||
|- | |||
|} | |||
==Significance== | |||
*Usually associated with disease | |||
*Isolated LPFB associated with [[MI]]<ref>Godat FJ and Gertsch M. Isolated left posterior fascicular block: a reliable marker for inferior myocardial infarction and associated severe coronary artery disease. Clin Cardiol. 1993; 16(3):220-226.</ref> | |||
*Exclude other causes of RAD ([[PE]], [[COPD]], [[RVH]], Lateral [[MI]]) | |||
==See Also== | ==See Also== | ||
*[[ECG (Basics)]] | *[[ECG (Basics)]] | ||
*[[Left anterior fascicular block]] | |||
==External Links== | |||
*[https://canadiem.org/fascicular-blocks/ CanadiEM - The Boring Guide to ECG's: Fascicular Blocks] | |||
== | ==References== | ||
<references/> | |||
[[Category: | [[Category:Cardiology]] | ||
Latest revision as of 01:47, 2 July 2021
Criteria
Diagnostic criteria include[1]:
- Right axis deviation (>110)
- QRS < 120ms
- qR in III and aVF
- rS in I and aVL
LAFB vs LPFB[2]
| LAFB | LPFB | |
| Axis | Left axis deviation | Right axis deviation |
| I and aVL | Upright QRS | Downgoing QRS |
| III | Downgoing QRS | Upright QRS |
Significance
- Usually associated with disease
- Isolated LPFB associated with MI[3]
- Exclude other causes of RAD (PE, COPD, RVH, Lateral MI)
See Also
External Links
References
- ↑ Surawicz B, et al. AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: part III: intraventricular conduction disturbances. Journal of the American College of Cardiology. 2009; 53(11): 976–981.
- ↑ Mattu A and Brady WJ. ECG's for the Emergency Physician. BMJ Books. Sep 19, 2003.
- ↑ Godat FJ and Gertsch M. Isolated left posterior fascicular block: a reliable marker for inferior myocardial infarction and associated severe coronary artery disease. Clin Cardiol. 1993; 16(3):220-226.