Several points of convincing evidence in the upper strip indicate that the rhythm is VT. First, the beginning of the wide QRS tachycardia near the end of the strip is not preceded by a P wave, proving ...
In figure 1, the 4th beat in tracing (a) suddenly has a longer PR interval than the others. The findings in tracing (b) suggest AV Wenckebach phenomenon (type I 2° AV block). The findings in tracing ...
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