Skip to main content

Table 3 Rate of Procedures, Mechanical Circulatory Support, and Mortality (2003–2009)

From: Hospital market concentration and the use of mechanical circulatory support devices in acute myocardial infarction complicated by cardiogenic shock

  Competitive / Unconcentrated Moderately Concentrated Highly Concentrated p-value
  (n = 10,873) (n = 6526) (n = 15,007)  
Mechanical circulatory support 5087 (46.8%) 2933 (44.9%) 6676 (44.5%) < 0.01
 Percutaneous devices 45 (0.4%) 15 (0.2%) 7 (0.1%) < 0.01
 Nonpercutaneous devices 42 (0.4%) 21 (0.3%) 26 (0.2%) < 0.01
 Intraaortic balloon pump 5024 (46.2%) 2918 (44.7%) 6647 (44.3%) < 0.01
 Extracorporeal membrane oxygenation 68 (0.6%) 4 (0.1%) 13 (0.1%) < 0.01
Procedures
 Coronary angiography 7103 (65.3%) 4280 (65.6%) 10,037 (66.9%) 0.02
 Right heart catheterization 441 (4.1%) 144 (2.2%) 238 (1.6%) < 0.01
 Percutaneous coronary intervention 4753 (43.7%) 2719 (41.7%) 6748 (45.0%) < 0.01
 Coronary artery bypass graft 2251 (20.7%) 1389 (21.3%) 2489 (16.6%) < 0.01
 In-hospital mortality 3997 (36.8%) 2434 (37.3%) 5545 (36.9%) 0.77