Barthel index at admission
≥75
50-74
25-49
<25
Unknown

Systolic BP (mm Hg)
≥155
140-154
125-139
110-124
95-109
<95

Age (years)
<75
75-79
80-84
85-89
≥90

NT-proBNP (pg/mL)
<8000
8000-15999
16000-23999
≥24000
Unknown

Potassium (mEq/L)
<3.5
3.5-4.9
5-5.5
>5.5

NYHA class IV at admission
Yes
No
Positive troponine level
Normal
Positive
Unknown

Respiratory rate(breaths per min)
<25
25-29
≥30

Low output symptoms
Yes
No

Oxygen saturation (%)
95-100
90-94
84-89
<84

Episode associated with ACS
Yes
No

Hypertrophy at ECG
Yes
No

Creatinine (mg/dL)
<1.5
1.5-2.4
≥2.5