1. Sheldon RS, Grubb BP, 2nd, Olshansky B, Shen WK, Calkins H, Brignole M, et al. 2015 heart rhythm society expert consensus statement on the diagnosis and treatment of postural tachycardia syndrome, inappropriate sinus tachycardia, and vasovagal syncope. Heart Rhythm. 2015;12(6):e41–63.
2. DaCosta JM. Medical diagnosis: with special reference to practical medicine: a guide to the knowledge and discrimination of diseases. Philadelphia, PA: J.B. Lippincott & Co.; 1864.
3. DaCosta JM. On irritable heart; a clinical study of a form of functional cardiac disorder and its consequences. Am J Med Sci. 1871;61.
4. Maclean WC. Diseases of the heart in the British army: the cause and the remedy. Br Med J. 1867:161–4.
5. Cohn AE. The cardiac phase of the war neurosis. Am J Med Sci. 1919;158:453–70.