The considerable effort causes her to pass out shortly afterward.

The overdose causes her to pass out for just a moment.

Fast or slow arrhythmias may cause you to pass out.

But keep in mind that an arrhythmia could cause you to pass out (lose consciousness).

That caused him to pass out on the beach while exercising.

This causes her to pass out and die from shock.

The stress of witnessing this causes her to pass out.

His grip on consciousness was so tenuous, however, that he thought the effort of speaking might cause him to pass out.

This causes Tony to nearly pass out from one of his panic attacks.

Could that have somehow been what caused her to pass out?