Comparison of the use of hemodynamic support in patients ≥80 years versus patients <80 years during high-risk percutaneous coronary interventions (from the Multicenter PROTECT II Randomized Study). - Pershad A; Fraij G; Massaro JM; David SW; Kleiman NS; Denktas AE; Wilson BH; Dixon SR; Ohman EM; Douglas PS; Moses JW; O'Neill WW (The American journal of cardiology, 2014)