How Does Bradycardia Cause Hypotension? We often think of tachycardia as a warning sign, but bradycardia can be just as dangerous, especially when it comes to low blood pressure. So how exactly does bradycardia lead to hypotension? Let’s walk through the physiology. Remember, Cardiac Output = Heart Rate × Stroke Volume This is one of the most foundational equations in cardiovascular physiology: Your blood pressure is closely linked to cardiac output. So if your heart rate drops, your cardiac out