There has been many clinical trials and research papers on EECP. To help in your understanding and comfort of EECP we have listed a number of links for your benefit.
Zheng ZS, Li TM, Kambic H, et al. (1983).
"Sequential external counterpulsation (SECP) in China". Trans Am Soc Artif Intern Organs 29: 599–603
http://www.ncbi.nlm.nih.gov/pubmed/6673295
Arora RR, Chou TM, Jain D, et al. (June 1999).
"The multicenter study of enhanced external counterpulsation (MUST-EECP): effect of ECP on exercise-induced myocardial ischemia and anginal episodes".
J. Am. Coll. Cardiol. 33 (7): 1833–40.
Lawson WE, Hui JC, Zheng ZS, et al. (1996).
"Improved exercise tolerance following enhanced external counterpulsation: cardiac or peripheral effect?".
http://www.ncbi.nlm.nih.gov/pubmed/8793157
Werner D, Schneider M, Weise M, Nonnast-Daniel B, Daniel WG (October 1999).
"Pneumatic external counterpulsation: a new noninvasive method to improve organ perfusion".
Am. J. Cardiol. 84 (8): 950–2, A7–8.
doi:10.1016/S0002-9149(99)00477-4. PMID10532522.
http://www.ajconline.org/article/S0002-9149(99)00477-4/abstract
Feldman AM, Silver MA, Francis GS, De Lame PA, Parmley WW (April 2005).
"Treating heart failure with external counterpulsation (ECP): design of the Prospective Evaluation of ECP in Heart Failure (PEECH) trial".
J. Card. Fail. 11 (3): 240–5.
http://en.wikipedia.org/wiki/Enhanced_external_counterpulsation
Soran O, Crawford LE, Schneider VM, Feldman AM (March 1999).
"Enhanced external counterpulsation in the management of patients with cardiovascular disease". ClinCardiol 22 (3): 173–8.
http://www.ncbi.nlm.nih.gov/pubmed/10084058
Manchanda A, Soran O (October 2007).
"Enhanced external counterpulsation and future directions: step beyond medical management for patients with angina and heart failure".
J. Am. Coll. Cardiol. 50 (16): 1523–31.
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Bonetti PO, et al. (June 4, 2003). Enhanced External Counterpulsation for Ischemic Heart Disease. Journal of the American College of Cardiology, 41(11), 1918–25.
http://content.onlinejacc.org/cgi/content/full/41/11/1918
Arora RR, Chou TM, & Jain D, et al. (June, 1999). The Multicenter Study of Enhanced External Counterpulsation (MUST-EECP): Effect of EECP on Exercise-Induced Myocardial Ischemia and Anginal Episodes.
http://www.northamericanheart.com/pdf/must.pdf
Michaels AD, Accad M, & Ports TA, et al. (September 3, 2002). Left Ventricular Systolic Unloading and Augmentation of Intracoronary Pressure and Doppler Flow During Enhanced External Counterpulsation. Circulation, 106(10), 1237–1242.
http://circ.ahajournals.org/cgi/content/short/01.CIR.0000028336.95629.B0v1
Michaels AD, Linnemeier G, Soran O, Kelsey SF, & Kennard ED. (2004). Two-Year Outcomes After Enhanced External Counterpulsation for Stable Angina Pectoris (from the International EECP Patient Registry [IEPR]). American Journal of Cardiology, 93, 461–464.
http://www.medscape.com/viewarticle/544941_2
Arora RR, Chou TM, & Jain D, et al. (January, 2002). Effects of Enhanced External Counterpulsation on Health-Related Quality of Life Continue 12 Months After Treatment: A Substudy of the Multicenter Study of Enhanced External Counterpulsation. Journal of Investigative Medicine, 50(1), 25–32.
http://onlinelibrary.wiley.com/doi/10.1002/clc.4960251404/pdf
GeorgiannLinnemeier, MD, Andrew D. Michaels, MD, OzlemSoran, MD, Elizabeth D. Kennard, PhD Enhanced External Counterpulsation in the Management of Angina in the Elderly.
http://www.medscape.com/viewarticle/450215
Lawson WE, Hui JCK, & Cohn PF. (April, 2000). Long-Term Prognosis of Patients with Angina Treated with Enhanced External Counterpulsation: Five-Year Follow-Up Study. Clinical Cardiology, 23(4), 254–258.
http://onlinelibrary.wiley.com/doi/10.1002/clc.4960230406/pdf
Soran O, Kennard ED, Holubkov R, Strobeck J, & Feldman AM. (2002). Enhanced External Counterpulsation as a Treatment for Chronic Angina Patients with Left Ventricular Dysfunction: A Report from the International EECP Patient Registry (IEPR). CHF, 8, 297–302.
http://onlinelibrary.wiley.com/doi/10.1111/j.1527-5299.2002.00286.x/pdf
Soran O. (January-February, 2004). A New Treatment Modality in Heart Failure. Cardiology In Review, 12(1), 15–Counterpulsation in Treating Coronary Artery Patients with a History of Congestive Heart Failure. Cardiology, 96, 78–84.
http://www.eecp.com.pk/Documents/EECP%20FOLDER.pdf
Kronhaus KD, & Lawson WE. (2002). Is Enhanced External Counterpulsation the Treatment Choice for Microvascular Angina? Journal of Investigative Medicine, 51(Suppl 2), S360 (26).
http://www.northamericanheart.com/?pg=moreclinical.html
Crawford LE. (2002). Experience with Enhanced External Counterpulsation (EECP) in Coronary Artery Disease. Today’s Therapeutic Trends, 20(3), 243–252.
http://www.nexhealth.ca/index.php?page=enhanced-external-counterpulsation
Linnemeier GC, Kennard ED, & Soran O, et al. (2003). Enhanced External Counterpulsation for the Relief of Angina in Patients With Diabetes: A One- Year Clinical Outcome Study. American Heart Journal, 146(3), 453–8.
http://www.edc.gsph.pitt.edu/iepr/Bibliography%2006-17-03.pdf
Linnemeier G, et al. (2003). Enhanced External Counterpulsation in the Management of Angina in the Elderly. American Journal of Geriatric Cardiology, 12(2), 90–94.
http://www.mendeley.com/research/enhanced-external-counterpulsation-management-angina-elderly/
Lawson WE, & Hui JCK. (November, 2000). Enhanced External Counterpulsation for Chronic Myocardial Ischemia. The Journal of Critical Illness, 15(11), 629–636.
http://content.onlinejacc.org/cgi/content/short/33/7/1833
Urano H, Ikeda H, & Ueno T, et al. (January, 2001). Enhanced External Counterpulsation Improves Exercise Tolerance, Reduces Exercise-Induced Myocardial Ischemia and Improves Left Ventricular Diastolic Filling in Patients with Coronary Artery Disease. Journal of the American College of Cardiology
http://content.onlinejacc.org/cgi/content/short/37/1/93
Urano H, Lida S, & Fukami K, et al. (October, 2000). Intermittent Shear Stimuli by Enhanced External Counterpulsation (EECP) Restores Endothelial Function in Patients with Coronary Artery Disease. Circulation, 102(18 Suppl 2), II–57(266).
http://www.goksenmedikal.com/docs/doc1.pdf
Masuda D, Nohara R, & Hirai T, et al. (August, 2001). Enhanced External Counterpulsation Improved Myocardial Perfusion and Coronary Flow Reserve in Patients with Chronic Stable Angina; Evaluation by 13N-Ammonia Positron Emission Tomography. European Heart Journal, 22(16), 1451–1458.
http://eurheartj.oxfordjournals.org/content/22/16/1451.full.pdf
WuGF, Qiang SZ, & Zheng ZS, et al. (1999). A Neurohormonal Mechanism for the Effectiveness of Enhanced External Counterpulsation. Circulation, 100(18), I-832(4390).
http://www.igihealthcare.com/congestive-heart-failure.php
Feldman AM. (December, 2002). Enhanced External Counterpulsation: Mechanism of Action. Clinical Cardiology, 25(12 Suppl 2), II 11–15.
Bonetti PO, Barsness GW, & Keelan PC, et al. (May 21, 2003).
Enhanced External Counterpulsation Improves Endothelial Function in Patients with Symptomatic Coronary Artery Disease. Journal of the American College of Cardiology, 41(10), 1761–1768.
http://content.onlinejacc.org/cgi/content/full/41/10/1761
Michaels AD, Kennard ED, & Kelsey SE, et al. (June, 2001). Does Higher Diastolic Augmentation Predict Clinical Benefit from Enhanced External Counterpulsation?: Data from the International EECP Patient Registry (IEPR). Clinical Cardiology, 24(6), 453–458.
http://globalheartfoundation.org/eecp-reports/mayoclinicEECP_articleinjacc_v4311_jun03.pdf.pdf
Enhanced External Counterpulsation as a New Treatment Modality for Patients with Erectile Dysfunction. Froschermaier SE, Werner D, Leike S, Schneider M, Waltenberger J, Daniel WG, Wirth MP. UrologiaInternationalis. 1998;61(3):168-171.
http://www.goksenmedikal.com/docs/doc11.pdf
Enhanced External Counterpulsation Improves Skin Oxygenation and Perfusion Hilz MJ, Werner D, Marthol H, Flachskampf FA, Daniel WG. European Journal of Clinical Investigation. 2004 Jun;34(6):385-91.
http://ejechocard.oxfordjournals.org/content/10/1/120.full.pdf
Effect of Enhanced External Counterpulsation on Medically Refractory Angina Patients With Erectile Dysfunction Posted 06/06/2007E. Lawson;1 J. C. K. Hui;1 E. D. Kennard;2 O. Soran;3 P. A. McCullough;4 S. F. Kelsey
http://www.ecprf.org/Effect_of_enhanced_external_counterpulsation_on.pdf