enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Right axis deviation - Wikipedia

    en.wikipedia.org/wiki/Right_axis_deviation

    If the electrical axis is between -30° and -90° this is considered left axis deviation. If the electrical axis is between +90° and +180° this is considered right axis deviation (RAD). RAD is an ECG finding that arises either as an anatomically normal variant or an indicator of underlying pathology.

  3. Right ventricular hypertrophy - Wikipedia

    en.wikipedia.org/wiki/Right_ventricular_hypertrophy

    Nonetheless, the ECG is used to assist with the diagnosis of RVH. A post mortem study on 51 adult male patients concluded that anatomical RVH may be diagnosed using one or more of the following ECG criteria: [8] Right axis deviation of more than (or equal to) 110° (see hexaxial reference figure) R-wave dominant over S-wave in V1 or V2

  4. QRS complex - Wikipedia

    en.wikipedia.org/wiki/QRS_complex

    The definition of poor R wave progression (PRWP) varies in the literature. It may be defined, for example, as R wave of less than 2–4 mm in leads V 3 or V 4 and/or presence of a reversed R wave progression, which is defined as R in V 4 < R in V 3 or R in V 3 < R in V 2 or R in V 2 < R in V 1, or any combination of these. [11]

  5. 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.

  6. Bundle branch block - Wikipedia

    en.wikipedia.org/wiki/Bundle_branch_block

    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 lead I. Left bundle branch block widens the entire QRS, and in most cases shifts the heart's electrical axis to the ...

  7. Left ventricular hypertrophy - Wikipedia

    en.wikipedia.org/wiki/Left_ventricular_hypertrophy

    R or S in limb leads ≥20 mm; S in V 1 or V 2 ≥30 mm; R in V 5 or V 6 ≥30 mm; 3 ST-T Abnormalities: ST-T vector opposite to QRS without digitalis; ST-T vector opposite to QRS with digitalis; 3 1 Negative terminal P mode in V 1 1 mm in depth and 0.04 sec in duration (indicates left atrial enlargement) 3 Left axis deviation (QRS of −30 ...

  8. Torsades de pointes - Wikipedia

    en.wikipedia.org/wiki/Torsades_de_pointes

    An R-on-T can initiate torsades. Sometimes, pathologic T-U waves may be seen in the ECG before the initiation of torsades. [19] A "short-coupled variant of torsade de pointes", which presents without long QT syndrome, was also described in 1994 as having the following characteristics: [20] Drastic rotation of the heart's electrical axis

  9. Tetralogy of Fallot - Wikipedia

    en.wikipedia.org/wiki/Tetralogy_of_Fallot

    These impulses are recorded by an ECG, which shows how fast, the rhythm, intensity and timing of the electrical impulses as they travel through the heart. [51] Electrocardiography shows right ventricular hypertrophy (RVH), along with right axis deviation. [24] RVH is noted on EKG as tall R-waves in lead V1 and deep S-waves in lead V5–V6. [52]