Broad QS Morphology in Standard and Left Precordial Leads
Report :
Sinus rhythm
VEB, possibly fusion beat
Runs of ventricular tachycardia 210 – 150/min
Non-specific ST/T changes
Probable old anterolateral infarction
Comment :
All the VT complexes have QS morphology. In the left precordial leads, this absence of R waves precludes the diagnosis of WPW conduction of either ‘A’ or ‘B’ type104.
In this case, one cannot be sure whether the runs are of sustained or non-sustained (less than 30 sec) variety, since only the onset of one and the termination of another run are recorded, conveniently leaving all 12 leads of the ECG for sinus rhythm.
Partly due to therapy of VT, her sinus became a sick sinus (below, 117a). The sinus capture beats (all the early ones) are a good example of the RP-PR reciprocity).
Just having a P wave in front of QRS is not enough (Fig 117b).
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