The CardioLens Blog

Sharper rhythms.
Smarter clinicians.

Clinical ECG education, ACLS insights, and rhythm interpretation tips for medical students, nurses, paramedics, and physicians.

Nursing

The 5 ECGs Every New Nurse Should Recognize Before Their First Shift

From normal sinus rhythm to life-threatening VF, these are the five rhythms every nurse must identify instantly. Master them before you step onto the floor.

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ACLS

MEGA CODES Explained: Why Branching Scenarios Beat Static ACLS Practice

Traditional ACLS drills test memorization. MEGA CODES test judgment. Here's why consequence-driven simulations produce better resuscitation teams.

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Advanced ECG

VT vs SVT with Aberrancy: Using the Brugada Algorithm

Misdiagnosing VT as SVT is one of the most common — and dangerous — errors in emergency medicine. The Brugada algorithm gives you a structured 4-step path to the right answer.

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STEMI

Recognizing STEMI: A Step-by-Step Guide to ST Elevation

Time is myocardium. Learn the lead groupings, morphology patterns, and STEMI mimics that separate a call to the cath lab from a potential misdiagnosis.

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Fundamentals

The 6-Second Method: How to Calculate Heart Rate on Any ECG

Three ways to calculate heart rate — with tradeoffs every clinician should know. Master the 6-second method, the 300 rule, and the exact calculation.

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