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2. Right bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Right_bundle_branch_block

   A right bundle branch block ( RBBB) is a heart block in the right bundle branch of the electrical conduction system. [ 1] During a right bundle branch block, the right ventricle is not directly activated by impulses traveling through the right bundle branch. However, the left bundle branch still normally activates the left ventricle.

3. Bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Bundle_branch_block

   Diagnosis. A bundle branch block can be diagnosed when the duration of the QRS complex on the ECG exceeds 120 ms. A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right. The ECG will show a terminal R wave in lead V1 and a slurred S wave in ...

4. Left bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Left_bundle_branch_block

   Cardiology, Emergency Medicine. Left bundle branch block ( LBBB) is a conduction abnormality in the heart that can be seen on an electrocardiogram (ECG). [ 1] In this condition, activation of the left ventricle of the heart is delayed, which causes the left ventricle to contract later than the right ventricle .

5. Arrhythmogenic cardiomyopathy - Wikipedia

   en.wikipedia.org/wiki/Arrhythmogenic_cardiomyopathy

   Arrhythmogenic cardiomyopathy ( ACM) is an inherited heart disease. [ 1] ACM is caused by genetic defects of parts of the cardiac muscle known as desmosomes, areas on the surface of muscle cells which link them together. The desmosomes are composed of several proteins, and many of those proteins can have harmful mutations .

6. Intraventricular block - Wikipedia

   en.wikipedia.org/wiki/Intraventricular_block

   ECG characteristics of an intraventricular block subtype - RBBB showing wide QRS complexes with a terminal R wave in lead V1 and a prolonged S wave in lead V6. An intraventricular block is a heart conduction disorder — heart block of the ventricles of the heart. [ 1] An example is a right bundle branch block, right fascicular block ...

7. Heart block - Wikipedia

   en.wikipedia.org/wiki/Heart_block

   Heart block. Heart block ( HB) [ 1] is a disorder in the heart 's rhythm due to a fault in the natural pacemaker. [ 2] This is caused by an obstruction – a block – in the electrical conduction system of the heart. Sometimes a disorder can be inherited. Despite the severe-sounding name, heart block may cause no symptoms at all in some cases ...

8. Right axis deviation - Wikipedia

   en.wikipedia.org/wiki/Right_axis_deviation

   Right axis deviation. The electrical axis of the heart is the net direction in which the wave of depolarization travels. It is measured using an electrocardiogram (ECG). Normally, this begins at the sinoatrial node (SA node); from here the wave of depolarisation travels down to the apex of the heart. The hexaxial reference system can be used to ...

9. Bifascicular block - Wikipedia

   en.wikipedia.org/wiki/Bifascicular_block

   Bifascicular block on an electrocardiogram. Bifascicular block is characterized by right bundle branch block with left anterior fascicular block , left bundle branch block, or right bundle branch block with left posterior fascicular block on electrocardiography. Complete heart block could be the cause of syncope that is otherwise unexplained if ...