Left posterior fascicular block: Difference between revisions
No edit summary |
No edit summary |
||
| (4 intermediate revisions by 3 users not shown) | |||
| Line 5: | Line 5: | ||
#Right axis deviation (>110) | #Right axis deviation (>110) | ||
#QRS < 120ms | #QRS < 120ms | ||
#qR in III and | #qR in III and aVF | ||
#rS in I and aVL | #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>=== | ===LAFB vs LPFB<ref>Mattu A and Brady WJ. ECG's for the Emergency Physician. BMJ Books. Sep 19, 2003.</ref>=== | ||
{| {{table}} | {| {{table}} | ||
| align="center" style="background:#f0f0f0;"| | | align="center" style="background:#f0f0f0;"|''''' | ||
| align="center" style="background:#f0f0f0;"|'''LAFB''' | | align="center" style="background:#f0f0f0;"|'''LAFB''' | ||
| align="center" style="background:#f0f0f0;"|'''LPFB''' | | align="center" style="background:#f0f0f0;"|'''LPFB''' | ||
| Line 21: | Line 21: | ||
|- | |- | ||
|} | |} | ||
==Significance== | ==Significance== | ||
*Usually associated with disease | *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> | *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, | *Exclude other causes of RAD ([[PE]], [[COPD]], [[RVH]], Lateral [[MI]]) | ||
==See Also== | ==See Also== | ||
*[[ECG (Basics)]] | *[[ECG (Basics)]] | ||
*[[Left anterior fascicular block]] | *[[Left anterior fascicular block]] | ||
==External Links== | |||
*[https://canadiem.org/fascicular-blocks/ CanadiEM - The Boring Guide to ECG's: Fascicular Blocks] | |||
==References== | ==References== | ||
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.