You would have known if pulmonary test was done. You would have had a mask over your face the entire stress test to monitor the amount of oxygen you were using and how much stress your cardiovascular pulmonary system was under. It monitors your breathing O2 and CO2. Also, there would have been a pre-test with you blowing into a test instrument to measure the amount of air you can inhale and exhale.

The electrolytes are the first thing they check on me when I have PVCs and issues with ICD/Pacemaker as a common cause. It looks at potassium, magnesium, and other electrolytes which can affect the heart rhythm and functions. I think electrolytes are included in complete blood test but you may not have gotten it and need to ask if they did one.