Remove Hemorrhage Remove Tachycardia Remove Ultrasound
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Tachycardia must make you doubt an ACS or STEMI diagnosis; put it all in clinical context

Dr. Smith's ECG Blog

He was rushed by residents into our critical care room with a diagnosis of STEMI, and they handed me this ECG: There is sinus tachycardia with ST elevation in II, III, and aVF, as well as V4-V6. ACS and STEMI generally do not cause tachycardia unless there is cardiogenic shock. He had this ECG recorded. Are the lungs clear?

STEMI 52
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A Child with Blunt Trauma

Dr. Smith's ECG Blog

Interpretation: There is sinus tachycardia, with right bundle branch block (RBBB). 5) Myocardial contusion (edema and hemorrhage in the myocardium) which may result in dysrhythmias, blocks (especially RBBB as here), and poor cardiac contractility, including wall motion abnormalities. She was intubated.

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A woman in her 20s with syncope

Dr. Smith's ECG Blog

The ECG shows sinus tachycardia, a narrow, low voltage QRS with alternating amplitudes, no peaked T waves, no QT prolongation, and some minimal ST elevation in II, III, and aVF (without significant reciprocal STD or T wave inversion in aVL). It is difficult to tell if there is collapse during diastole due to the patient’s tachycardia.

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90 year old with acute chest and epigastric pain, and diffuse ST depression with reciprocal STE in aVR: activate the cath lab?

Dr. Smith's ECG Blog

Systematic Assessment of the ECG in Figure-1: My Descriptive Analysis of ECG findings in Figure-1 is as follows: Sinus tachycardia at ~110/minute. A slightly prolonged QTc ( although this is difficult to assess given the tachycardia ). A emergent cardiology consult can be helpful for equivocal cases. A normal PR interval.

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46 year old with chest pain develops a wide complex rhythm -- see many examples

Dr. Smith's ECG Blog

Automatic activity refers to enhanced pacemaking function (typically from a non sinus node source), for example atrial tachycardia. However the patient continued to have chest pain and bedside ultrasound showed hypokinesis of the septum with significantly reduced LVEF. The most common triggered arrhythmia is Torsades de Pointes.

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Emergency Department Syncope Workup: After H and P, ECG is the Only Test Required for Every Patient.

Dr. Smith's ECG Blog

Check : [vitals, SOB, Chest Pain, Ultrasound] If the patient has Abdominal Pain, Chest Pain, Dyspnea or Hypoxemia, Headache, Hypotension , then these should be considered the primary chief complaint (not syncope). Also consider non-hemorrhagic volume depletion, dehydration : orthostatic vitals may uncover this [see Mendu et al. (3)].