With newer, non-invasive imaging techniques, the origin of other, so-called adventitial sounds or heart clicks has been appreciated. These are short, high-pitched sounds.^{[citation needed]}

• The mitral valve in cases of mitral stenosis may open with an opening snap^[1][2] on the beginning of diastole.
• Patients with mitral valve prolapse may have a mid-systolic click along with a murmur, referred to as apical late systolic murmur.^[3] Early systolic clicks may also be present in some patients.^[4]
• Aortic and pulmonary stenosis may cause an ejection click^[5] immediately after S₁.