Rosenbaum Extrasystoles
Report:
Sinus rhythm
VEBs in bigeminy
Borderline ST segment depression
Comment:
In the frontal plane, the VEBs have a right axis (not deviation, since VEBs do not have a range of normal axes). They are Rosenbaum extrasystoles, often seen in people with normal hearts. That’s why the broad R wave in V1 is called Rosenbaum’s normal pattern. Its significance is that it’s diagnostic of ventricular ectopy. Rosenbaum extrasystoles originate in the right ventricle. Although right ventricular VEBs have been shown in some studies to be more benign, they do not guarantee that the heart is in fact normal, nor are they confined to otherwise normal hearts.
The ST segment is horizontal in V6 and almost 1mm depressed in 2 and aVF. This may be a post-ectopic phenomenon – the poor man’s exercise test – or simply a false positive sign for ischæmia, not rare in women. La donna è mobile!
Two more examples are shown below (Figs 134a, 134b).
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