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  2. Bundle branch block - Wikipedia

    en.wikipedia.org/wiki/Bundle_branch_block

    The ECG will show a QS or rS complex in lead V1 and a monophasic R wave in lead I. Another normal finding with bundle branch block is appropriate T wave discordance. In other words, the T wave will be deflected opposite the terminal deflection of the QRS complex. Bundle branch block, especially left bundle branch block, can lead to cardiac ...

  3. Right bundle branch block - Wikipedia

    en.wikipedia.org/wiki/Right_bundle_branch_block

    Right bundle branch block; An illustration of a right bundle branch block located in intraventricular septum: ECG characteristics of a typical RBBB showing wide QRS complexes with a terminal R wave in lead V1 and a prolonged S wave in lead V6. Specialty: Cardiology: Types: complete right bundle branch block (CRBBB) incomplete right bundle ...

  4. QRS complex - Wikipedia

    en.wikipedia.org/wiki/QRS_complex

    Poor R wave progression is commonly attributed to anterior myocardial infarction, but it may also be caused by left bundle branch block, Wolff–Parkinson–White syndrome, right and left ventricular hypertrophy, or a faulty ECG recording technique. [11]

  5. Wikipedia : Osmosis/Bundle Branch Block

    en.wikipedia.org/.../Bundle_Branch_Block

    So if the block happens on the right side, it’s referred to as a right bundle branch block. So with this type, the electrical signal starts at the SA node, contracts the atria, moves through the AV node, splits at the bundle of His, and then moves down the left bundle branch but is blocked on the right bundle branch.

  6. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.

  7. Intrinsicoid deflection - Wikipedia

    en.wikipedia.org/wiki/Intrinsicoid_deflection

    The time of the onset of the intrinsicoid deflection, also referred to as the ventricular activation time or R wave peak time, is measured from the beginning of the QRS complex to the peak of the R wave. [1] In the presence of bundle branch block or ventricular hypertrophy, the depolarization impulse takes a longer than normal period of time to ...

  8. Intraventricular block - Wikipedia

    en.wikipedia.org/wiki/Intraventricular_block

    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, bifascicular block, trifascicular block. [2] [3]

  9. Bundle branches - Wikipedia

    en.wikipedia.org/wiki/Bundle_branches

    There are two branches of the bundle of His: the left bundle branch and the right bundle branch, both of which are located along the interventricular septum. The left bundle branch further divides into the left anterior fascicle and the left posterior fascicle. These structures lead to a network of thin filaments known as Purkinje fibers.