Patients and cases include post-cardiac catheterization, positive troponins, atrial fibrillation with RVR, acute CHF, critically low potassium, sodium, or magnesium, sepsis, symptomatic bradycardia or tachycardia, second- or third-degree heart blocks, pacemaker insertions, chest pain, first-run dialysis patients (not chronic renal failure), malfunctioning AICDs, NSTEMI, and post-STEMI patients transferring from the ICU. IV drips include nitro (up to 20mcg), heparin, amiodarone (which can be initiated and decreased from 33ml/hr to 17ml/hr after 6 hours), Cardizem, dopamine (no titration), and dobutamine (no titration).