Atrioventricular Block: 1st Degree
Figure 1: ECG Strip
A first degree atrioventricular (AV) block occurs when electrical impulses moving through the AV node are delayed but not blocked. A first degree AV block is present when the PR interval exceeds 0.30 sec.
Table 1: ECG Characteristics
- A first degree heart block does not cause haemodynamic disturbance; thus, no specific treatment is needed.
Figure 2: ECM Analysis, Record 111
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