The 12-lead ECG provides 12 views of the heart. The 12 views are generated through only 10 electrodes. Four limb electrodes attach to the inner Read More
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12-Lead ECG – lead views
The ten electrodes combine to provide 12 views of the heart. The limb leads combine to provide the three bipolar leads (leads I, II, and Read More
12-Lead ECG – systematic analysis
Equipped with a carefully formed clinical impression of the patient, a systematic approach to 12-lead ECG interpretation makes the 12-lead ECG a reliable assessment tool. Read More
12-Lead Views
The ten electrodes combine to provide 12 views of the heart. The limb leads combine to provide the three bipolar leads (leads I, II, and Read More
15 and 18 Lead ECG
A 12 Lead ECG provides a fairly good electrical picture of the left side of the heart. The right side of the heart is somewhat Read More
Aberrant Conduction
For about 15% of rhythms with wide QRS complexes, impaired bundle branch conductivity prolongs ventricular depolarization. Ischemia, infarction, and antiarrythmics can slow or block transmission Read More
Abnormal P Wave
A normal wave is typically upright in leads I, II and aVF, and biphasic in lead V1. An abnormal P wave can possess several alternate Read More
Abnormal T Wave
A wave that includes both an upright (positive) and downward (negative) deflection. Expect a T wave to follow every QRS complex. The T wave is Read More
Absolute Refractory Period
Period when the cardiac cells cannot depolarize irrespective of the strength of the electrical impulse. 1. Six Second ECG Guidebook (2012), T Barill, p. 189 Read More
Accelerated Idioventricular Rhythm
Cardiac rhythm that originates from the ventricular with a rate of 40-100/minute; QRS is wide with P waves absent. Pacemaker sites can deliver impulses faster Read More