Remove Bradycardia Remove Chest Pain Remove Pulmonary
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ECG Blog #396 — Why the Flat Line?

Ken Grauer, MD

KEY Point: Although true that patients with longstanding, severe pulmonary disease may manifest a QRST complex in standard lead I with marked overall reduction in QRST amplitude ( See ECG Blog #65 — regarding Schamroth’s Sign ) — you should never normally see a completely flat line in any of the standard limb leads.

Blog 178
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A teenager involved in a motor vehicle collision with abnormal ECG

Dr. Smith's ECG Blog

ECG of pneumopericardium and probable myocardial contusion shows typical pericarditis Male in 30's, 2 days after Motor Vehicle Collsion, complains of Chest Pain and Dyspnea Head On Motor Vehicle Collision. Gunshot wound to the chest with ST Elevation Would your radiologist make this diagnosis, or should you record an ECG in trauma?

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31 Year Old Male with RUQ Pain and a History of Pericarditis. Submitted by a Med Student, with Great Commentary on Bias!

Dr. Smith's ECG Blog

He said that his pain does not feel like his previous episode of pericarditis, and is not related to meals. He denied chest pain, shortness of breath, nausea, fever, chills, rashes, cough, and leg pain. Does subsegmental pulmonary embolism matter? The ST/T ratio in V6, however, is slightly greater.

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See OMI vs. STEMI philosophy in action

Dr. Smith's ECG Blog

On his physical examination, cardiac and pulmonary auscultation was completely normal. His first electrocardiogram ( ECG) is given below: --Sinus bradycardia. As his pain was very severe, emergency physicians concerned of aortic dissection and ordered a thoracic CT scan. Bi-phasic scan showed no dissection or pulmonary embolism.

STEMI 52
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The ECG told the whole story, but no one listened: ECG interpretation skills are critical to patient outcomes.

Dr. Smith's ECG Blog

Then the notes mention "cardiogenic shock" but without any reference to a cardiac echo or to a chest x-ray. Was there pulmonary edema? Now chest pain free. There is a junctional bradycardia. Then they were worried about sepsis as an etiology of hypotension. Not mentioned in physicians' notes.

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Tachycardia, fever to 105, and ischemic ST Elevation -- a Bridge too Far

Dr. Smith's ECG Blog

If a patient presents with chest pain and a normal heart rate, or with shockable cardiac arrest, then ischemic appearing ST elevation is STEMI until proven otherwise. The estimated pulmonary artery systolic pressure is 37 mmHg + RA pressure. Normal estimated left ventricular ejection fraction lower limits of normal.

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STEMI with Life-Threatening Hypokalemia and Incessant Torsades de Pointes

Dr. Smith's ECG Blog

A late middle-aged man presented with one hour of chest pain. Bedside ultrasound showed no effusion and moderately decreased LV function, with B-lines of pulmonary edema. There is also bradycardia. Bradycardia puts patients at risk for "pause-dependent" Torsades de Pointes. Most recent echo showed EF of 60%.

STEMI 52