Author + information
- Received May 19, 1994
- Revision received October 30, 1994
- Accepted March 31, 1995
- Published online August 1, 1995.
- Isao Kinoshita, MD1,a,
- Osamu Katoh, MDa,
- Jin Nariyama, MDa,
- Satoru Otsuji, MDa,
- Hitone Tateyama, MDa,
- Tohru Kobayashi, MDa,
- Nobuhiko Shibata, MDa,
- Tadashi Ishihara, MDb and
- Nakaaki Ohsawa, MDb
- ↵1Address for correspondence: Dr. Isao Kinoshita, First Department of Internal Medicine, Osaka Medical College, 2-7 Daigaku-cho, Takatsuki-city, Osaka 569, Japan
Objectives. The purpose of the present study was to assess the effect of bridging collateral vessels on the success of coronary angioplasty of chronic total occlusions in the context of state of the art technology and operator skill.
Background. Coronary angioplasty of chronic total occlusions has been associated with relatively low success rates. Because the presence of bridging collateral vessels in chronic total occlusion has been reported to be the major predictive factor in procedural failure, angioplasty is often not recommended in patients with such vessels.
Methods. Three hundred ninety-seven consecutive patients undergoing coronary angioplasty for chronic total occlusion were classified into two groups. Patients in group I had chronic total occlusion with bridging collateral vessels (97 patients, 109 total occlusions), and patients in group II had chronic total occlusion without such vessels (300 patients, 324 total occlusions).
Results. The mean ± SD duration of occlusion was 46 ± 66 months (range 2 to 170) in group I and 27 ± 39 months (range 2 to 112) in group II (p < 0.05, high power value 0.83, group I vs. group II). Angioplasty for single-vessel disease was performed in a smaller proportion of patients in group I than in group II (22% vs. 36%, p < 0.05; power value 0.77). Procedural success was achieved in 82 chronic total occlusions in group I and 270 chronic total occlusions in group II (75% vs. 83%, p = 0.07; power value 0.53). The rates of restenosis and reocclusion were 54% and 16%, respectively, for group I and 56% and 13%, respectively, for group II (p = 0.76, 0.46; power value 0.51, 0.47). Complications were minor with no Q wave infarction or requirement for urgent bypass surgery in either group. Of 81 patients with unsuccessful coronary angioplasty, 1 patient from group I (1%) and 3 patients from group II (1%) required pericardiocentesis because of cardiac tamponade. Guide wire manipulation did not impair the flow of bridging collateral channels in group I.
Conclusions. Coronary angioplasty can open chronic total occlusions, with or without bridging collateral channels, for safe and effective recanalization without major complications.
☆ This study was supported in part by a grant from Fukuda Denshi Inc., Tokyo, Japan. It was presented in part at the 66th Annual Scientific Sessions of the American Heart Association, Atlanta, Georgia, November 1993.
- Received May 19, 1994.
- Revision received October 30, 1994.
- Accepted March 31, 1995.