Several factors affect the risk for a patient undergoing angioplasty of a coronary artery.
Parameters associated with risk:
(3) number of vessels involved
(4) number of lesions
(5) history of congestive heart failure
(6) left ventricular ejection fraction
(8) degree of occlusion
(9) diabetes mellitus
(10) timing for PTCA
(11) antiplatelet therapy
(12) left main equivalent disease
< 70 years
number of vessels involved
number of lesions
history of CHF
left ventricular ejection fraction
none or stable
type of lesion
B or C
degree of occlusion
timing for PTCA
immediately after thrombolytic therapy
left main equivalent disease
• Type A lesion = discrete, < 10 mm in length, readily accessible, concentric, in a nonangulated segment, smooth contour, little or no calcification, not totally occluded, no thrombus, no major side branch involvement, not ostial
• Experienced operators using newer technologies may be able to manage higher risk lesions.
• The risk assignment has low positive and negative predictive values.
To read more or access our algorithms and calculators, please log in or register.