Carol's pick:
Yogendra J, Yogendra HJ, Ambardekar S, Lele RD, Shetty S, Dave M, Husein N. Beneficial effects of yoga lifestyle on reversibility of ischaemic heart disease: caring heart project of International Board of Yoga. J Assoc Physicians India. 2004 Apr;52:283-9. PMID: 15636328
The researchers evaluated the role of lifestyle modification based on Yoga techniques, stress management and dietary modifications in retardation of coronary artery disease. At the end of a year, they showed regression of the disease. Much along the lines of research by Dr. Dean Ornish of the United States.

Other research links:
Astin JA, Shapiro SL, Eisenberg DM, Forys KL. Mind-body medicine: state of the science, implications for practice. (Conclusion: "There is considerable evidence of efficacy for several mind-body therapies in the treatment of coronary artery disease.)

Bharshankar JR, Bharshankar RN, Deshpande VN, Kaore SB, Gosavi GB.Effect of yoga on cardiovascular system in subjects above 40 years. Indian J Physiol Pharmacol. 2003 Apr;47(2):202-6. PMID: 15255625

Damodaran A, Malathi A, Patil N, Shah N, Suryavansihi, Marathe S. Therapeutic potential of yoga practices in modifying cardiovascular risk profile in middle aged men and women. J Assoc Physicians India. 2002 May;50(5):633-40. PMID: 12186115

Jayasinghe SR. Yoga in cardiac health (a review). Eur J Cardiovasc Prev Rehabil. 2004 Oct;11(5):369-75. PMID: 15616408

Mahajan AS, Reddy KS, Sachdeva U. Lipid profile of coronary risk subjects following yogic lifestyle intervention. Indian Heart J. 1999 Jan-Feb;51(1):37-40.  PMID: 10327777

Mamtani R, Mamtani R. Ayurveda and yoga in cardiovascular diseases.Cardiol Rev. 2005 May-Jun;13(3):155-62. PMID: 15834238

Manchanda SC, Narang R, Reddy KS, Sachdeva U, Prabhakaran D, Dharmanand S, Rajani M, Bijlani R. Retardation of coronary atherosclerosis with yoga lifestyle intervention. J Assoc Physicians India. 2000 Jul;48(7):687-94. PMID: 11273502

McCaffrey R, Ruknui P, Hatthakit U, Kasetsomboon P. The effects of yoga on hypertensive persons in Thailand. Holist Nurs Pract. 2005 Jul-Aug;19(4):173-80. PMID: 16006832

Murugesan R, Govindarajulu N, Bera TK. Effect of selected yogic practices on the management of hypertension. Indian J Physiol Pharmacol. 2000 Apr;44(2):207-10. PMID: 10846637

Sundar S, Agrawal SK, Singh VP, Bhattacharya SK, Udupa KN, Vaish SK. Role of yoga in management of essential hypertension.Acta Cardiol. 1984;39(3):203-8. PMID: 6331698

Tulpule TH, Tulpule AT. Yoga. A method of relaxation for rehabilitation after myocardial infarction. Indian Heart J. 1980 Jan-Feb;32(1):1-7. PMID: 6991393