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40 Possible Causes for Left Axis Deviation, P Wave Absent

  • Hyperkalemia

    Role of inducing K loss via the GI tract in the management of hyperkalemia Setting Recommendations Hyperkalemia with severe ECG changes (e.g. absent P waves, wide QRS complex[doi.org] Left axis deviation. Absent P waves. Example 6 Hyperkalaemia: Sine wave appearance with severe hyperkalaemia (K 9.9 mEq/L). Example 7 Hyperkalaemia: Huge peaked T waves.[lifeinthefastlane.com] Example of bradycardia with absent or flattened p waves in hyperkalemia. Care of Dr. Smith’s ECG blog.[emergencymedicinecases.com]

  • Ventricular Tachycardia

    […] or even right axis deviation.[heartlandcardiology.com] Answers Rhythm: Regular Rate: 150 P Wave: absent PR interval: n/a QRS: Wide and bizarre Interpretation: Ventricular Tachycardia[ekg.academy] Rhythm Regular Rate Fast (100-250 bpm) P Wave Absent PR Interval Not measurable QRS Wide ( 0.10 sec), bizarre appearance Notes[practicalclinicalskills.com]

  • Left Bundle Branch Block

    Left bundle branch block is usually associated with normal or left axis deviation.[ncbi.nlm.nih.gov] The presence of a mid-QRS notching in more than two consecutive leads was a good predictor for the presence of SF (P 0.01), and when combined with an absent R-wave in lead[ncbi.nlm.nih.gov] Left bundle branch block is usually associated with normal or left axis deviation. Rarely the ECG shows a LBBB with changing QRS morphology and changing axis deviation.[ncbi.nlm.nih.gov]

  • Left Anterior Fascicular Block

    ECG changes: An absent P wave and often an absent QRS complex are seen.[frca.co.uk] The two current criteria for diagnosis of left anterior fascicular block (LAFB) were evaluated; they are marked left axis deviation (LAD) and a delay in the time of inscription[ncbi.nlm.nih.gov] It is caused by only the anterior half of the left bundle branch being defective. It is manifested on the ECG by left axis deviation.[en.wikipedia.org]

  • Atrial Standstill

    Diagnostic criteria of atrial standstill Absent P waves both on surface and intracardiac ECG. Junctional bradycardia.[metealpaslan.com] Note the LBBB morphology with left axis deviation indicating the pacing lead in the right ventricular apex.[en.ecgpedia.org] EKG Absent P waves. JVP Absent A waves.[medical-dictionary.thefreedictionary.com]

  • Sinus Arrest

    Occasionally and when the P waves are absent for a relatively long time, escape beats appear, as other groups of myocardial cells undertake the pacemaking process for a brief[symptoma.com] Left anterior hemiblock is more common and causes left axis deviation on the ECG. Left posterior hemiblock causes right axis deviation on the ECG.[fastbleep.com] waves: Sinus P waves with basic rhythm; absent during pause PR interval: Normal (0.12 to 0.20 second) with basic rhythm; absent during pause QRS complex: Normal (0.10 second[aibolita.com]

  • Atrial Septal Defect

    Inverted P waves in the inferior leads suggest an absent or deficient sinus node, as may be seen in a sinus venosus defect. 16,17 Right atrial overload is often present.[circ.ahajournals.org] When an ostium primum atrial defect is present, the ECG reveals left axis deviation.[healio.com] Individuals with a sinus venosus ASD exhibit a left axis deviation of the P wave (not the QRS complex).[en.wikipedia.org]

  • Bifascicular Block

    ECG changes: An absent P wave and often an absent QRS complex are seen.[frca.co.uk] […] with right bundle-branch block and left axis deviation (56% or 55/98).[ncbi.nlm.nih.gov] Wide complex tachycardia with RBBB morphology in lead V1 and left axis deviation.[ecgmedicaltraining.com]

  • Left Posterior Fascicular Block

    Verapamil-sensitive, idiopathic left ventricular tachycardia (ILVT) with right bundle branch block configuration and left-axis deviation is known to be due to re-entry mechanism[ncbi.nlm.nih.gov] ECG changes: An absent P wave and often an absent QRS complex are seen.[frca.co.uk] The electrical axis will be shifted to the left (left axis deviation), ranging between -45 and -90 .[ecgwaves.com]

  • Atrial Septal Defect - Atrioventricular Conduction Defects Syndrome

    If left axis deviation is present, think about left anterior fascicular block, and if right axis deviation is present, think about left posterior fascicular block in addition[frca.co.uk] Axis Deviation.[file.scirp.org] The 12-lead ECG will show an incomplete right bundle branch block and left axis deviation (in contrast to the secundum ASD which has a right axis deviation).[healio.com]

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