4715
METHODS AND RESULTS : In 20 patients ( 14 men and 6 women aged 39 to 72 years ) referred for cardiac catheterization for the evaluation of chest pain , we measured heart rate , systemic arterial pressure , LV pressure and its first derivative ( dP / dt ) , and LV volumes and ejection fraction before and during the final 2 to 3 minutes of a 15 - minute intracoronary infusion of saline ( n = 10 , control subjects ) or cocaine hydrochloride 1 mg / min ( n = 10 ) .
 Disease: chest pain; Chemical: cocaine hydrochloride
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: chest pain; Chemical: cocaine hydrochloride