Echocardiography

Not to be confused with electrocardiography or other types of electrography or ECMO.

Echocardiography
Three-dimensional echocardiogram of a heart viewed from the apex.
ICD-9-CM88.72
MeSHD004452
OPS-301 code3-052
MedlinePlus003869

Echocardiography, also known as cardiac ultrasound, is the use of ultrasound to examine the heart. It is a type of medical imaging, using standard ultrasound or Doppler ultrasound.[1] The visual image formed using this technique is called an echocardiogram, a cardiac echo, or simply an echo.

Echocardiography is routinely used in the diagnosis, management, and follow-up of patients with any suspected or known heart diseases. It is one of the most widely used diagnostic imaging modalities in cardiology. It can provide a wealth of helpful information, including the size and shape of the heart (internal chamber size quantification), pumping capacity, location and extent of any tissue damage, and assessment of valves. An echocardiogram can also give physicians other estimates of heart function, such as a calculation of the cardiac output, ejection fraction, and diastolic function (how well the heart relaxes).

Echocardiography is an important tool in assessing wall motion abnormality in patients with suspected cardiac disease. It is a tool which helps in reaching an early diagnosis of myocardial infarction, showing regional wall motion abnormality. Also, it is important in treatment and follow-up in patients with heart failure, by assessing ejection fraction.[2][3]

Echocardiography can help detect cardiomyopathies, such as hypertrophic cardiomyopathy, and dilated cardiomyopathy. The use of stress echocardiography may also help determine whether any chest pain or associated symptoms are related to heart disease.

The most important advantages of echocardiography are that it is not invasive (does not involve breaking the skin or entering body cavities) and has no known risks or side effects.[4]

Not only can an echocardiogram create ultrasound images of heart structures, but it can also produce accurate assessment of the blood flowing through the heart by Doppler echocardiography, using pulsed- or continuous-wave Doppler ultrasound. This allows assessment of both normal and abnormal blood flow through the heart. Color Doppler, as well as spectral Doppler, is used to visualize any abnormal communications between the left and right sides of the heart, any leaking of blood through the valves (valvular regurgitation), and estimate how well the valves open (or do not open in the case of valvular stenosis). The Doppler technique can also be used for tissue motion and velocity measurement, by tissue Doppler echocardiography.

Echocardiography was also the first ultrasound subspecialty to use intravenous contrast. Echocardiography is performed by cardiac sonographers, cardiac physiologists (UK), or physicians trained in echocardiography.

Recognized as the "Father of Echocardiography", the Swedish physician Inge Edler (1911–2001), a graduate of Lund University, was the first of his profession to apply ultrasonic pulse echo imaging in diagnosing cardiac disease, which the acoustical physicist Floyd Firestone had developed to detect defects in metal castings. In fact, Edler in 1953 produced the first echocardiographs using an industrial Firestone-Sperry Ultrasonic Reflectoscope. In developing echocardiography, Edler worked with the physicist Carl Hellmuth Hertz, the son of the Nobel laureate Gustav Hertz and grandnephew of Heinrich Rudolph Hertz.[5][6]

  1. ^ Cleve, Jayne; McCulloch, Marti L. (2018), Nihoyannopoulos, Petros; Kisslo, Joseph (eds.), "Conducting a Cardiac Ultrasound Examination", Echocardiography, Springer International Publishing, pp. 33–42, doi:10.1007/978-3-319-71617-6_2, ISBN 978-3319716176
  2. ^ Oh, J. K. (1 January 2007). "Echocardiography in heart failure: Beyond diagnosis". European Journal of Echocardiography. 8 (1): 4–14. doi:10.1016/j.euje.2006.09.002. ISSN 1525-2167. PMID 17240313.
  3. ^ Modin, Daniel; Andersen, Ditte Madsen; Biering-Sørensen, Tor (June 2018). "Echo and heart failure: when do people need an echo, and when do they need natriuretic peptides?". Echo Research and Practice. 5 (2): R65–R79. doi:10.1530/erp-18-0004. PMC 5958420. PMID 29691224.
  4. ^ Hanton, G.; Eder, V.; Rochefort, G.; Bonnet, P.; Hyvelin, J. M. (2008). "Echocardiography, a non-invasive method for the assessment of cardiac function and morphology in preclinical drug toxicology and safety pharmacology". Expert Opinion on Drug Metabolism & Toxicology. 4 (6): 681–696. doi:10.1517/17425255.4.6.681. PMID 18611111. S2CID 72290828. Retrieved 30 June 2021.
  5. ^ Batohi, Bhavna; Sidhu, Paul S. (2014). "The Development of Ultrasound for Clinical Use". In Thompson, Gilbert (ed.). Pioneers of Medicine Without a Nobel Prize. World Scientific. pp. 141–159. ISBN 978-1783263868. Retrieved 23 September 2016.
  6. ^ Singh, Siddharth; Goyal, Abha (2007). "The origin of echocardiography: A Tribute to Inge Edler". Tex. Heart Inst. J. 34 (4): 431–438. PMC 2170493. PMID 18172524.