JOURNAL ARTICLE

The impact of platelet count on mortality in unstable angina/non-ST-segment elevation myocardial infarction

Christian Mueller, Franz-Josef Neumann, Willibald Hochholzer, Dietmar Trenk, Thomas Zeller, André P Perruchoud, Heinz J Buettner
American Heart Journal 2006, 151 (6): 1214.e1-7
16781221

BACKGROUND: Expanding the knowledge of pathogenesis of arteriosclerosis points at a central role of platelets in the development of acute coronary syndromes. Therefore, we sought to determine the impact of platelet count on long-term outcome in unstable angina/non-ST-segment elevation myocardial infarction (UA/NSTEMI) receiving contemporary treatment.

METHODS: This prospective cohort study included 1616 consecutive patients with UA/NSTEMI. All patients underwent coronary angiography and, if appropriate, subsequent catheter-based revascularization within 24 hours of admission. Patients were divided in quintiles according to platelet count. The primary end point was all-cause mortality during long-term follow-up of up to 60 months.

RESULTS: During follow-up (median 17 months, interquartile range 6-31 months), 89 deaths and 74 nonfatal myocardial infarctions occurred. Patients with higher platelet counts were younger, more often female, and had lower height and weight as compared with patients with lower platelet counts. Mortality was significantly lower among patients in the second quintile of platelet count (181-210 x 10(9)/L) as compared with the other quintiles (hazard ratio 0.39, 95% CI 0.19 to 0.81, P = .011). Kaplan-Meier survival analysis showed cumulative 4-year mortality rates of 12.5%, 3.8%, 10.4%, 9.8%, and 11.4% for patients in the first, second, third, fourth, and fifth quintiles. This association persisted after multivariate adjustment. No association of platelet count and nonfatal myocardial infarctions was observed.

CONCLUSIONS: We found a nonlinear association between platelet count and long-term mortality. The lowest mortality was observed in patients with a platelet count between 181 and 210 x 10(9)/L.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
16781221
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"