Yes, it WAS great dialogue, and I, too, hope to see more of this kind on here, as we all have much to learn from one another.
I think much of my support of the voiding concept is due to my background in dialysis as well as still being pretty much a new grad, and remember well the constant impressing on my memory the importance of renal function and/or ability to void before adding K+... also remember quizzes and even NCLEX having a question on this subject.
Not to minimize the importance of the cardiac issues by ANY means, but the simple manner in which this question was phrased, and getting that "which one FIRST" feeling from the question, just led me to to believe this was the answer they were looking for.
Loved hearing all the responses and the critical thinking in progress here ! Good work !