EKG Interpretation for DUMMIES
The Paramedic Coach・11 minutes read
The EKG waveform consists of the P wave representing atrial depolarization, the QRS complex reflecting ventricular depolarization and contraction, the T wave signifying ventricular repolarization, with intervals like PR, ST, and QT key in measuring electrical activity and diagnosing heart conditions. Electrodes for EKG placement are color-coded and correspond to specific body parts, with optimal placement on the humeral heads and close to the ankles, crucial for accurate readings.
Insights
- The P wave on an EKG signifies the Atria depolarizing, while the QRS complex represents the ventricles depolarizing, crucial for understanding the heart's electrical activity.
- The ST segment, extending from the end of the S wave to the start of the T wave, is vital for diagnosing heart attacks, emphasizing the importance of this portion of the EKG for medical professionals.
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Recent questions
What does the P wave represent?
Atrial depolarization.
What does the QRS complex signify?
Ventricular depolarization and heart contraction.
What is the purpose of the T wave?
Ventricular repolarization and relaxation.
How is the PR interval measured?
From the beginning of the P wave to the start of the QRS complex.
What does the ST segment indicate?
Crucial for diagnosing heart attacks.
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Summary
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Understanding EKG Waves and Intervals
- The P wave is the first positive deflection on an EKG, representing the Atria depolarizing.
- The Q wave is the first negative deflection, part of the QRS complex, which includes the R wave (second positive deflection) and the S wave (second negative deflection).
- The QRS complex represents the ventricles depolarizing, leading to the heart contracting.
- The T wave is the third positive deflection, signifying ventricular repolarization and relaxation.
- The PR interval measures from the beginning of the P wave to the start of the QRS complex, typically between 0.12 to 0.20 seconds.
- The ST segment extends from the end of the S wave to the start of the T wave, crucial for diagnosing heart attacks.
- The QT interval ranges from the beginning of the Q wave to the end of the T wave, with normal values between 0.35-0.45 seconds for males and 0.36-0.46 seconds for females.
- Electrodes for EKG placement are color-coded (white, black, red, green) and correspond to specific body parts (right arm, right leg, left arm, left leg), with optimal placement on the humeral heads and close to the ankles.
