QRS Complex

May 26, 2017 by in CARDIOLOGY Comments Off on QRS Complex

Fig. 4.1 Formation of QRS vector loop. (a) Divide the ventricular depolarization into nine parts, record the amplitude and direction of the instantaneous complex vector; (b) Draw a line to…

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P Wave

May 26, 2017 by in CARDIOLOGY Comments Off on P Wave

Fig. 2.1 Cause of the morphology of sinus P wave [Characteristics of Electrocardiogram of the Normal Sinus P Wave] 1. P wave in sinus rhythm appears small, rounded, and upright…

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ST Segment

May 26, 2017 by in CARDIOLOGY Comments Off on ST Segment

Fig. 5.1 ST segment changes in superacute phase Acute Phase (Hours/Days to Weeks) [ECG Recognition] 1. Inverted T wave   2. ST elevation with obliquely straight morphology/convex   3. Pathological…

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Basic Knowledge of ECG

May 26, 2017 by in CARDIOLOGY Comments Off on Basic Knowledge of ECG

Fig. 1.1 Normal ECG First, you will find that there are a lot of square boxes. Second, you will find that there are many confusing waves. Finally, you may also…

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P-R Interval

May 26, 2017 by in CARDIOLOGY Comments Off on P-R Interval

Heart rate (bpm) <70 71~90 91~110 111~130 >130 Age (years) ≥18 0.20 0.19 0.18 0.17 0.16 Age (years) 14~17 0.19 0.18 0.17 0.16 0.15 Age (years) 7~13 0.18 0.17 0.16…

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T Wave

May 26, 2017 by in CARDIOLOGY Comments Off on T Wave

Fig. 6.1 Normal T wave Above all, when analyzing T wave, the judgment should be based on the patients’ history and clinical manifestation, not only the ECG, because various factors…

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Other Common Abnormal ECGs

May 26, 2017 by in CARDIOLOGY Comments Off on Other Common Abnormal ECGs

Fig. 7.1 Prolonged Q-T interval 7.2 Hyperkalemia [ECG Recognition] 1. Mild hyperkalemia: when the serum potassium level is approximately between 5.7 and 6.5 mmol/L, P wave widens; tall, peaked, narrow-based,…

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