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ECG interpretation: Characteristics of the normal ECG (P-wave, QRS complex, ST segment, T-wave)

…determine whether the ECG waves and intervals are normal. This chapter will focus on the ECG waves in terms of morphology (appearance), durations and intervals…

🟠 Reference values for adult ECG

…in lead II. Common findings Sinus rhythm (which is the normal rhythm) has the following characteristics: (1) heart rate 50–100 beats per minute; (2…

Acute Pulmonary Embolism: Risk Stratification and Reperfusion

…prognostic evaluation using two complementary domains: Indicators of acute PE severity , including clinical findings, RV dysfunction on imaging, and myocardial injury shown by laboratory testing…

Heart Failure With Mildly Reduced Ejection Fraction

…or abnormal LV filling supports the diagnosis Unlike HFpEF, objective evidence of structural or functional cardiac abnormality or raised natriuretic peptides is not mandatory for…

Interpretation of myocardial perfusion images (Myocardial SPECT / PET)

…is based on principles similar to those used in echocardiography. The 17 segment model of the left ventricle serves as a standardized framework for identifying…

ST segment depression in myocardial ischemia and differential diagnoses

…Characteristics of ischemic ST segment depressions on ECG. Current guideline criteria for ischemic ST segment depression: New horizontal or downsloping ST segment depressions ≥0,5…

Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome

…presents ECG findings during normal atrioventricular impulse transmission as well as ECG findings during pre excitation. Figure 1. Hallmarks of pre excitation on the ECG…

T-waves in ischemia: hyperacute, inverted (negative), Wellen's sign & de Winter's sign

…A net positive QRS complex should be followed by a net positive T wave (refer to the previous discussion on concordance/discordance and Figure 1 )…

Digoxin - ECG changes, arrhythmias, conduction defects & treatment

…also provoke abnormal automaticity in cells that normally do not exhibit automaticity. The effect on automaticity should be distinguished from the effect on impulse conduction…

Mechanisms of cardiac arrhythmias: from automaticity to re-entry (reentry)

…should not be considered abnormal. For example, sinus bradycardia (a slow rhythm directed by the sinoatrial node) is a common finding in athletes and during…

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