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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.

• The mitral valve in cases of mitral stenosis may open with an opening snap 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. Early systolic clicks may also be present in some patients.
• Aortic and pulmonary stenosis may cause an ejection click immediately after S₁.

References

1. MOUNSEY P (April 1953). "The opening snap of mitral stenosis". Br Heart J. 15 (2): 135–42. doi:10.1136/hrt.15.2.135. PMC 479479. PMID 13041992.
2. "The Auscultation Assistant - Mitral Stenosis". Retrieved 2019-12-13.
3. Rizzon P, Biasco G, Brindicci G, Mauro F (March 1973). "Familial syndrome of midsystolic click and late systolic murmur". Br Heart J. 35 (3): 245–59. doi:10.1136/hrt.35.3.245. PMC 458599. PMID 4692656.
4. Hutter A, Dinsmore R, Willerson J, DeSanctis R (October 1971). "Early Systolic Clicks due to Mitral Valve Prolapse". Circulation. 44 (4): 516–22. doi:10.1161/01.CIR.44.4.516. PMC 373684. PMID 16560573.
5. "Techniques - Heart Sounds & Murmurs Exam - Physical Diagnosis Skills - University of Washington School of Medicine". Retrieved 2009-03-06.

• Symptoms and signs: Cardiac
• Audible medical signs