Table 2

Components of the New Zealand priority score 9 (maximum score 100)2-150

Clinical featuresScore
Degree of coronary artery obstruction (% diameter occluded)
 No coronary artery disease (⩽ 50%)0
 1 vessel disease (50 to 74%)6
 > 1 vessel disease (50 to 74%)7
 1 vessel disease (75 to 89%)7
 1 vessel disease (⩾ 90%)10
 2 vessel disease (50 to 89%)12
 2 vessel disease (both ⩾ 90%)13
 1 vessel disease (⩾ 90% in PLAD)15
 2 vessel disease (⩾ 90% in left anterior descending artery)15
 2 vessel disease (⩾ 90% in PLAD)18
 3 vessel disease18
 3 vessel disease (⩾ 90% in at least one artery)20
 3 vessel disease (⩾ 75% in PLAD)21
 3 vessel disease (⩾ 90% in PLAD)24
 Left main (50 to 74%)25
 Left main (75 to 89%)26
 Left main (⩾ 90%)32
Angina: Canadian Cardiovascular Society class after appropriate treatment
 Class I: angina on strenuous exertion1
 Class II: angina on walking or climbing stairs rapidly2
 Class III: angina on walking one or two level blocks8
 Class IV-A16
 Class IV-B20
 Class IV-C23
Exercise stress test (Bruce protocol)
 Negative0
 Mildly positive4
 Positive8
 Very positive16
 Extremely positive20
Left ventricular function
 < 35%10
 35 to 50%6
 > 50%0
Social factors: ability to work, care for dependents or live independently
 Not threatened but more difficult1
 Threatened but not immediately5
 Immediately threatened15
Total score100
Age: If ⩾ 70, prognostic adjustment = (100 − age) ÷ 30

  • ↵2-150 Modified by a professional advisory committee in October 1996. PLAD, proximal left anterior descending coronary artery.