hi and welcome.
well you as cath lab staff is more curious about bigeminies as you frequently would see them alarming , it is because those patients has heartattacks , have poor LV left ventricular functions and structural heart diseases. bigeminies can often be normal phenomena in states of anxiety
, overeating, excess of exercise, too much use of caffine, tea or coffee, smoking, and also in noncardiac diseases like hyperactive thyroid
. you should get your echocardiography
too see any structural disease. get an ETT done to see underlying ischemia
, and once they are ruled out get your thyroid functions and ofcourse Hb, as anemia is one reason of PVCs and bigeminies. good luck and continue atenolol
prescribed by your doctor till you get your investigations done,