A peculiar walk in this old man, a certain slight but painful appearing yawing in his gait, had at an early period of the voyage excited the curiosity of the mariners.
In V1, P wave is biphasic, with an initial positive deflection corresponding to activation of the right atrium, and a subsequent negative deflection, resulting from activation of the left atrium.
Those are the five people that I'd sample, and we could talk more about what's a good way to generate a random sample from a population so it's not skewed one way or the other.