2004;78:122 8. 927. Burkhoff D, Schmidt S, Schulman SP, et al. Transmyocardial laser revascularisation compared with continued medical therapy for treatment of refractory angina pectoris: a prospective randomised trial. ATLANTIC Investigators. Angina Treatments-Lasers and Normal Therapies in Comparison. Lancet. 1999;354:885 90. 928. Allen KB, Dowling RD, Fudge TL, et al. Comparison of transmyo- cardial revascularization with medical therapy in patients with refractory angina. N Engl J Med. 1999;341:1029 36. 929. Schofield PM, Sharples LD, Caine N, et al. Transmyocardial laser revascularisation in patients with refractory angina: a randomised con- trolled trial. Lancet. 1999;353:519 24. 930. Dowling RD, Petracek MR, Selinger SL, et al. Transmyocardial revas- cularization in patients with refractory, unstable angina. Circulation. 1998;98:II73 II75. 931. Allen KB, Dowling RD, Angell WW, et al. Transmyocardial revascu- larization: 5-year follow-up of a prospective, randomized multicenter trial. Ann Thorac Surg. 2004;77:1228 34. 932. Liao L, Sarria-Santamera A, Matchar DB, et al. Meta-analysis of survival and relief of angina pectoris after transmyocardial revascular- ization. Am J Cardiol. 2005;95:1243 5. 933. Mukherjee D, Bhatt DL, Roe MT, et al. Direct myocardial revascular- ization and angiogenesis how many patients might be eligible? Am J Cardiol. 1999;84:598 600, A8. 934. Bernstein SJ, Brorsson B, Aberg T, et al. Appropriateness of referral of coronary angiography patients in Sweden. SECOR/SBU Project Group. Heart. 1999;81:470 7. 935. Brorsson B, Bernstein SJ, Brook RH, et al. Quality of life of patients with chronic stable angina before and four years after coronary revas- cularisation compared with a normal population. Heart. 2002;87: 140 5. 936. Akhtar M, Wu GF, Du ZM, et al. Effect of external counterpulsation on plasma nitric oxide and endothelin-1 levels. Am J Cardiol. 2006;98: 28 30. 937. Shechter M, Matetzky S, Feinberg MS, et al. External counterpulsation therapy improves endothelial function in patients with refractory angina pectoris. 