Bundle Branch Block - Revision history

Bara: /* References */

2013-10-15T14:40:59Z

References

Bara at 16:54, 5 July 2012

2012-07-05T16:54:12Z

Bara at 16:29, 21 March 2011

2011-03-21T16:29:50Z

Kthompson at 16:56, 15 March 2011

2011-03-15T16:56:17Z

Bara: Created page with '*Abnormal ventricular excitation as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block. ====Right Bundle Branch Block=…'

2010-07-02T09:53:17Z

Created page with '*Abnormal ventricular excitation as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block. ====Right Bundle Branch Block=…'

New page

*Abnormal ventricular excitation as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block.

====Right Bundle Branch Block====
Characterised by the failure or delay of conduction through the right bundle branch. Left ventricle is unaffected.

=====Causes=====
Pulmonary embolism, heart worm, electrolyte disturbances, congenital diseases etc.

'''ECG Appearance:''' Wide QRS complex, Wide S wave

=====Treatment=====
Treat the underlying cause

====Left Bundle Branch Block====
Characterised by the failure of conduction through the left bundle branch. Right ventricle is unaffected.

=====Causes=====
Congenital abnormalities, myocardial diseases etc.

=====Treatment=====
Treat the underlying cause

'''Left Anterior Fascicular Block'''=characterised by the failure of conduction through the anterior fascicle of the left bundle branch.

'''Causes:''' Electrolyte abnormalities, hypertrophic cardiomyopathy (cat), etc.

'''ECG Appearance:''' Normal QRS, tall R waves, deep S waves

'''Treatment:''' Treat the underlying cause[[Category:Impulse_Conduction_Abnormalities]][[Category:To_Do_-_Cardiovascular]]

← Older revision		Revision as of 14:40, 15 October 2013
Line 51:		Line 51:

	[[Category:Impulse_Conduction_Abnormalities]] [[Category:Expert_Review]]		[[Category:Impulse_Conduction_Abnormalities]] [[Category:Expert_Review]]
		+	[[Category:Cardiology Section]]

@@ Line 1: / Line 1: @@
-{{review}}
+{{OpenPagesTop}}
 == Introduction ==
@@ Line 45: / Line 45: @@
 Nelson, R.W. and Couto, C.G. (2009) Small Animal Internal Medicine (Fourth Edition), Mosby Elsevier.
 [[Category:Impulse_Conduction_Abnormalities]] [[Category:Expert_Review]]

@@ Line 1: / Line 1: @@
-== Introduction<br> ==
+{{review}}
-This condition is an abnormal ventricular excitation as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block.&nbsp;<br>
+This condition is an '''abnormal ventricular excitation''' as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block.
-Right bundle branch block is characterised by the failure or delay of conduction through the right bundle branch. The left ventricle is unaffected. Some causes of this condition include pulmonary embolism, heart worm, electrolyte disturbances, congenital diseases etc.<br>
+'''Right bundle branch block''' is characterised by the failure or delay of conduction through the right bundle branch. The left ventricle is unaffected. Some causes of this condition include pulmonary [[embolism]], [[Dirofilaria immitis|heart worm]], [[:Category:Electrolytes|electrolyte]] disturbances, congenital diseases etc.
-In left bundle branch block, there is failure of conduction through the left bundle branch and the right ventricle is unaffected. Causes of this include congenital abnormalities and myocardial diseases.<br>
+In '''left bundle branch block''', there is failure of conduction through the left bundle branch and the right ventricle is unaffected. Causes of this include congenital abnormalities and [[:Category:Myocardial Pathology|myocardial diseases]].
-There can also be a left anterior fasicular block, which is characterised by the failure of conduction through the anterior fascicle of the left bundle branch. Causes of this include electrolyte abnormalities and cardiomyopathies e.g. in the cat.<br>
+There can also be a '''left anterior fasicular block''', which is characterised by the failure of conduction through the anterior fascicle of the left bundle branch. Causes of this include electrolyte abnormalities and [[:Category:Cardiomyopathy|cardiomyopathies]] e.g. in the cat.
-== Signalment<br> ==
+== Signalment ==
-The disease is described in both cats and dogs.<br>
+The disease is described in both cats and dogs.
-== Clinical Signs<br> ==
+== Clinical Signs ==
-Many cases of bundle branch block are asymptomatic and are only detected on ECG. However, more severe cases will cause ventricular muscle damage and therefore signs of heart disease will occur. Some animals may present due to syncope, weakness or exercise intolerance.<br>
+Many cases of bundle branch block are asymptomatic and are only detected on ECG. However, more severe cases will cause ventricular muscle damage and therefore signs of heart disease will occur. Some animals may present due to syncope, weakness or exercise intolerance.
-== Diagnosis<br> ==
+== Diagnosis ==
-An Electrocardiograph (ECG) is the diagnostic method of choice. In a right bundle branch block, one may see a wide QRS complex and a wide S wave. In left anterior fasicular block there will be a normal QRS wave, a tall R waves and deep S waves.<span style="font-weight: bold;"></span><span style="font-weight: bold;" /><span style="font-weight: bold;" />'''<span style="font-weight: bold;" />'''<span style="font-weight: bold;" /><span style="font-weight: bold;" /><span style="font-weight: bold;" /><span style="font-weight: bold;" />
+An '''Electrocardiograph''' (ECG) is the diagnostic method of choice.
-== Treatment<br> ==
+== Treatment ==
-Unless the condition is congenital, treatment is by treating the underlying cause.<br>
+Unless the condition is congenital, treatment is by treating the underlying cause.
-== References<br> ==
+== References ==
-Ettinger, S.J. and Feldman, E. C. (2000) Textbook of Veterinary Internal Medicine Diseases of the Dog and Cat Volume 2 (Fifth Edition) W.B. Saunders Company<br>Ettinger, S.J, Feldman, E.C. (2005) Textbook of Veterinary Internal Medicine (6th edition, volume 2)W.B. Saunders Company<br>Fossum, T. W. et. al. (2007) Small Animal Surgery (Third Edition) Mosby Elsevier <br>Merck &amp; Co (2008) The Merck Veterinary Manual (Eighth Edition) Merial<br>Nelson, R.W. and Couto, C.G. (2009) Small Animal Internal Medicine (Fourth Edition) Mosby Elsevier. <br><br>
+Ettinger, S.J. and Feldman, E. C. (2000) Textbook of Veterinary Internal Medicine Diseases of the Dog and Cat Volume 2 (Fifth Edition), W.B. Saunders Company
-<br>
+Ettinger, S.J, Feldman, E.C. (2005) Textbook of Veterinary Internal Medicine (6th edition, volume 2), W.B. Saunders Company
-<br>
+Fossum, T. W. et. al. (2007) Small Animal Surgery (Third Edition), Mosby Elsevier
-[[Category:Impulse_Conduction_Abnormalities]] [[Category:To_Do_-_Review]]
+Merck & Co (2008) The Merck Veterinary Manual (Eighth Edition), Merial

@@ Line 1: / Line 1: @@
-*Abnormal ventricular excitation as the result of blockage to the right bundle branch, the left bundle branch, or left anterior fascicular block.
+== Introduction<br> ==
-====Right Bundle Branch Block====
+Right bundle branch block is characterised by the failure or delay of conduction through the right bundle branch. The left ventricle is unaffected. Some causes of this condition include pulmonary embolism, heart worm, electrolyte disturbances, congenital diseases etc.<br>
-=====Causes=====
+There can also be a left anterior fasicular block, which is characterised by the failure of conduction through the anterior fascicle of the left bundle branch. Causes of this include electrolyte abnormalities and cardiomyopathies e.g. in the cat.<br>
-'''ECG Appearance:''' Wide QRS complex, Wide S wave
+== Signalment<br> ==
-=====Treatment=====
+<br>
-====Left Bundle Branch Block====
+Many cases of bundle branch block are asymptomatic and are only detected on ECG. However, more severe cases will cause ventricular muscle damage and therefore signs of heart disease will occur. Some animals may present due to syncope, weakness or exercise intolerance.<br>
-=====Causes=====
+== Diagnosis<br> ==
-=====Treatment=====
+An Electrocardiograph (ECG) is the diagnostic method of choice. In a right bundle branch block, one may see a wide QRS complex and a wide S wave. In left anterior fasicular block there will be a normal QRS wave, a tall R waves and deep S waves.<span style="font-weight: bold;"></span><span style="font-weight: bold;" /><span style="font-weight: bold;" />'''<span style="font-weight: bold;" />'''<span style="font-weight: bold;" /><span style="font-weight: bold;" /><span style="font-weight: bold;" /><span style="font-weight: bold;" />
-'''Left Anterior Fascicular Block'''=characterised by the failure of conduction through the anterior fascicle of the left bundle branch.
+== Treatment<br> ==
-'''Causes:''' Electrolyte abnormalities, hypertrophic cardiomyopathy (cat), etc.
+<br>
-'''ECG Appearance:''' Normal QRS, tall R waves, deep S waves
+Ettinger, S.J. and Feldman, E. C. (2000) Textbook of Veterinary Internal Medicine Diseases of the Dog and Cat Volume 2 (Fifth Edition) W.B. Saunders Company<br>Ettinger, S.J, Feldman, E.C. (2005) Textbook of Veterinary Internal Medicine (6th edition, volume 2)W.B. Saunders Company<br>Fossum, T. W. et. al. (2007) Small Animal Surgery (Third Edition) Mosby Elsevier <br>Merck &amp; Co (2008) The Merck Veterinary Manual (Eighth Edition) Merial<br>Nelson, R.W. and Couto, C.G. (2009) Small Animal Internal Medicine (Fourth Edition) Mosby Elsevier. <br><br>
-'''Treatment:''' Treat the underlying cause[[Category:Impulse_Conduction_Abnormalities]][[Category:To_Do_-_Cardiovascular]]
+<br>