After Having An EKG Yesterday Following A Rapid Heart Beat

After having an EKG yesterday following a rapid heart beat episode, the Cardiologist quickly stated that my heart was healthy and i had probably had an Anxiety Attack. After forgetting to ask the Cardiologist if "BLOOD BOOST", containing the ingredient Green Coffee Extract, which I have been regularly taking for about 6 weeks, may have been the cause, a Nurse emphatically directed me to discontinue its use. Do you concur...that it may have been the cause ?