Blood pressure

According to the Twelfth Doctor, a binary vascular system led to extremely high blood pressure in comparison to single-hearted species like humans. (TV: Smile) The Thirteenth Doctor was noted to have high blood pressure, as well. (TV: Kerblam!)

For humans, a blood pressure of 160/90 was "not good". In one case, a patient with 160/90 went into cardiac arrest. (AUDIO: Visiting Hours)
 * This is a sign of hypertension, or high blood pressure.