<prompt> Answer this question truthfullyWhat does preload mean in the field of cardiology?  <response>: <reason> 1.Decreased venous blood pressure, most commonly resulting from reduced blood volume e.g., hemorrhage or gravity causing blood to pool in the lower limbs when standing upright.2.Impaired atrial contraction that can result from atrial arrhythmias such as atrial fibrillation.3.Increased heart rate e.g., atrial tachycardia, which reduces ventricular filling time.4.Decreased ventricular afterload, which enhances forward flow i.e., ejection thereby reducing end-systolic volume and end-diastolic volume secondarily.5.Ventricular diastolic failure decreased ventricular compliance caused, for example, by ventricular hypertrophy or impaired relaxation lusitropy.6.Inflow mitral and tricuspid valve stenosis, which reduces ventricular filling. 