During Biology class today, we conducted an EKG lab. Mine appeared with abnormal results. Mine differed from the average graph in that the spikes appeared to be inverted. Upon asking my teacher, he decided it was some muscle abnormality or foreign substance that was present on my skin. Should i be worried for any circulatory conditions, e.g. high blood pressure/aneurysms? QRS if im not mistaken, but just imagine a normal graph flipped upside down other students who used the same machine showed results that appeared normal to my limited knowledge