Textbooks
Labos, Christopher. Put the probe here;The First (But Not the Last) Echo Book You Should Read. 2017. Available on Apple Books: https://books.apple.com/gb/book/put-the-probe-here/id929427087

Online interactive learning (*excellent iPad app for learning standard windows)
http://pie.med.utoronto.ca/

American Society of Echocardiography Guidelines
https://www.asecho.org/ase-guidelines-by-publication-date/

Image Acquistion
Mitchell C, Rahko PS, Blauwet LA, Canaday B, Finstuen JA, Foster MC, et al. Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults: Recommendations from the American Society of Echocardiography. J Am Soc Echocardiogr [Internet]. 2019;32(1):1–64.
Available from: https://doi.org/10.1016/j.echo.2018.06.004

​Key ACC/AHA Guidelines
Nagueh SF, Smiseth OA, Appleton CP, Byrd BF, Dokainish H, Edvardsen T, et al. Recommendations for the Evaluation of Left Ventricular Diastolic Function by Echocardiography: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. Eur Hear J – Cardiovasc Imaging [Internet]. 2016;17(12):1321–60. Available from: https://academic.oup.com/ehjcimaging/article-lookup/doi/10.1093/ehjci/jew082
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Saric M, Armour AC, Arnaout MS, Chaudhry FA, Grimm RA, Kronzon I, et al. Guidelines for the Use of Echocardiography in the Evaluation of a Cardiac Source of Embolism. J Am Soc Echocardiogr [Internet]. 2016;29(1):1–42. Available from: http://dx.doi.org/10.1016/j.echo.2015.09.011

Porter TR, Shillcutt SK, Adams MS, Desjardins G, Glas KE, Olson JJ, et al. Guidelines for the use of echocardiography as a monitor for therapeutic intervention in adults: A report from the american society of echocardiography. J Am Soc Echocardiogr [Internet]. 2015;28(1):40–56. Available from: http://dx.doi.org/10.1016/j.echo.2014.09.009

Zoghbi WA, Adams D, Bonow RO, Enriquez-Sarano M, Foster E, Grayburn PA, et al. Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation: A Report from the American Society of Echocardiography Developed in Collaboration with the Society for Cardiovascular Magnetic Resonance. J Am Soc Echocardiogr. 2017;30(4):303–71. 

Further Reading by sub-specialty
​Critical Care Echocardiography
Kirkpatrick JN, Grimm R, Johri AM, Kimura BJ, Kort S, Labovitz AJ, et al. Recommendations for Echocardiography Laboratories Participating in Cardiac Point of Care Cardiac Ultrasound (POCUS) and Critical Care Echocardiography Training: Report from the American Society of Echocardiography. J Am Soc Echocardiogr [Internet]. 2020;33(4):409-422.e4. Available from: https://doi.org/10.1016/j.echo.2020.01.008

Price S, Via G, Sloth E, Guarracino F, Breitkreutz R, Catena E, et al. Echocardiography practice, training and accreditation in the intensive care: document for the World Interactive Network Focused on Critical Ultrasound (WINFOCUS). Cardiovasc Ultrasound [Internet]. 2008;6(1):49. Available from: http://cardiovascularultrasound.biomedcentral.com/articles/10.1186/1476-7120-6-49

Labovitz AJ, Noble VE, Bierig M, Goldstein SA, Jones R, Kort S, et al. Focused cardiac ultrasound in the emergent setting: a consensus statement of the American Society of Echocardiography and American College of Emergency Physicians. J Am Soc Echocardiogr [Internet]. 2010 Dec;23(12):1225–30. Available from: http://www.ncbi.nlm.nih.gov/pubmed/21111923