Serial lactate sampling during acetylcholine provocation detected metabolic ischemia in 60% of patients with suspected INOCA, with 17% of positive cases identified only at 2 minutes post-administration.
Does blood sampling at both 1 and 2 minutes reduce false-negative detection of metabolic ischemia during acetylcholine provocation?
Serial blood sampling at 1 and 2 minutes during acetylcholine provocation may improve the detection of metabolic ischemia by reducing false negatives.
Sampling at both 1 and 2 min may reduce false-negative detection of metabolic ischemia during ACh provocation.
Ito et al. (Wed,) conducted a letter in Suspected ischemia with no obstructive coronary arteries (INOCA) (n=20). Serial coronary artery-coronary sinus lactate sampling during acetylcholine provocation was evaluated on Detection of metabolic ischemia (negative lactate extraction ratio). Serial lactate sampling during acetylcholine provocation detected metabolic ischemia in 60% of patients with suspected INOCA, with 17% of positive cases identified only at 2 minutes post-administration.