Author + information
- Received June 5, 1984
- Revision received September 4, 1984
- Accepted September 20, 1984
- Published online January 1, 1985.
- Kunio Miyatake, MD*,‡,
- Mitsunori Okamoto, MD†,
- Naokazu Kinoshita, MD*,
- Yung-Dae Park, MD*,
- Seiki Nagata, MD*,
- Shiro Izumi, MD†,
- Kenji Fusejima, MD*,
- Hiroshi Sakakibara, MD* and
- Yasuharu Nimura, MD, MSc†
- ↵‡Address for reprints: Kunio Miyatake, MD, National Cardiovascular Center, 125, Fujishiro-dai 5-chome, Suita, Osaka 565, Japan.
Doppler echocardiography was used to evaluate the features of interventricular septal rupture in six patients with acute myocardial infarction and to substantiate the hemodynamic data and morphologic findings at surgery or autopsy. Although echocardiographic visualization of the septal rupture was obtained in only two of the six patients, unusual Doppler flow signals were detected in the apical portion of the right ventricle in all six patients. Five patients had unusual flow signals during both systole and diastole; one had such signals only during systole. The location of these unusual flow signals coincided with the site of septal rupture confirmed at surgery or autopsy. The pattern of the flow signals in one cardiac cycle was very similar to that of the pressure difference between the left and right ventricular cavities. These findings indicate that the unusual flow signals represent the left to right shunt flows resulting from septal rupture.
In conclusion, Doppler echocardiography may be a very useful tool for diagnosing interventricular septal rupture easily and noninvasively in patients with acute myocardial infarction.
- Received June 5, 1984.
- Revision received September 4, 1984.
- Accepted September 20, 1984.
- American College of Cardiology Foundation