Fig. 2

Nomogram for predicting in-hospital mortality in patients with PCI. Each variable has a coordinate axis, and by drawing a vertical line through the corresponding point on this coordinate axis, the point of intersection with the topmost scoring axis is the score of the variable. Adding all the variable scores together gives the in-hospital mortality probability corresponding to the total score at the bottom of the nomogram. In the type of stent option, “0” represents a non-drug-eluting stent and “1” represents a drug-eluting stent. In the ventilation treatment type options, “0” represents none, “1” represents oxygen therapy, “2” represents noninvasive mechanical ventilation, and “3” represents invasive mechanical ventilation. In the vasoactive drug option, “0” represents none, “1” represents vasopressin, “2” represents dobutamine, “3” represents epinephrine, “4” represents phenylephrine, “5” represents dopamine, “6” represents norepinephrine, “7” represents the use of any two vasoactive drugs, “8” represents the use of any three vasoactive drugs, and “9” represents the use of any four or more vasoactive drugs