Mammary Souffle

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ramyar Ghandriz MD[2]

Synonyms and Keywords: Accidental heart murmur


Mammary souffle is a benign heart condition that is related to pregnancy

Historical Perspective

  • Mammary souffle was first introduced by Gibson, G. A. classic paper about continous heart murmur on 1900.[1]


  • A form of continuous benign murmur related to pregnancy.


  • It is an innocent murmur.
  • Continuous murmur with maximal intensity during systole.
  • Best audible in intercostal spaces II-IV of sternal border.


  • The exact mechanism of this condition is not determined.
  • It is very common among pregnant women, every 3 will develop such condition out of 10.

Differentiating Mammary souffle from other Diseases

Epidemiology and Demographics

  • The incidence of mammary souffle among pregnant women is about 15000 out of 100000 .
  • There is no published difference between race or age of cases.

Risk Factors

  • Mammary souffle is a benign physiologic condition .
  • There is no known risk factor for this condition.


There is insufficient evidence to recommend routine screening for Mammary souffle .

Natural History, Complications, and Prognosis

  • Murmur can start from 3rd trimester and may continue until two weeks post partum.
  • This situation is usually self-limited and does not need any follow up.


Diagnostic Study of Choice

The diagnosis of Mammary souffle is made when all other causes for continuous heart murmur are ruled out.

History and Symptoms

The majority of patients with Mammary souffle are asymptomatic.

Physical Examination

  • Mammary souffle usually appears with a continuous murmur which subsides after one or two weeks post partum.
  • Any positive cardiac related physical exam findings must be evaluated.

Laboratory Findings

There are no diagnostic laboratory findings associated with Mammary souffle.


There are no ECG findings associated with Mammary souffle.


There are no x-ray findings associated with Mammary souffle.

Echocardiography or Ultrasound

There are no echocardiography/ultrasound findings associated with Mammary souffle.

CT scan

There are no CT scan findings associated with Mammary souffle.


There are no MRI findings associated with Mammary souffle.

Other Imaging Findings

There are no other imaging findings associated with Mammary souffle.

Other Diagnostic Studies

There are no other diagnostic studies associated with Mammary souffle.


  1. Scott, James T.; Murphy, Edmond A. (1958). "Mammary Souffle of Pregnancy". Circulation. 18 (5): 1038–1043. doi:10.1161/01.CIR.18.5.1038. ISSN 0009-7322.