Experimentally acute exposure to whole-body vibration resulted in changes in myocardial blood flows in the in vivo dog. Regional myocardial blood flows measured by a hydrogen gas clearance method were increased at a vibration frequency of 120 Hz and decreased at 50 Hz. No appreciable changes were found in presence of a beta-adrenergic blocker. The values of plasma cyclic nucleotides were increased at both frequencies of vibration, more at 50 Hz than at 120 Hz. No significant changes were observed in heart rates and arterial pressure during and after vibration load. These findings suggest that increased myocardial blood flows in response to vibration may be related more to the frequency of vibration than to beta-adrenergic actions.
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References
1.
Matoba T., Kusumoto H., Mizuki T., et al: Clinical features and laboratory findings of vibration disease: A review of 300 cases. Tohoku J Exp Med123:57-65, 1977.
2.
Matoba T., Itaya M., Toyomasu K., et al: Increased left ventricular function as an adaptive response in vibration disease. Am J Cardiol51:1223-1226, 1983.
3.
Matoba T., Chiba M., Sakurai T.: Body reactions during chain saw work. Br J Ind Med42:667-671, 1985.
4.
Bhattacharya A., Knapp CF, McCutcheon EP, et al: Cardiac responses of dogs to nonsynchronous and heart synchronous whole-body vibration. J Appl Physiol: Respirat Environ ExercisePhysiol46:549-555, 1979.
5.
Vukas M., Malek I., Hjalmarson ÅC: Myocardial depressant effect of vibrations in the isolated rabbit heart. Scand J Clin Lab Invest38:421-424, 1978.
6.
Hudlická O., Wright A.: The effect of vibration on blood flow in skeletal muscle in the rabbit . Clin Sci Mol Med204:461-474, 1978.
7.
Lindbald LE, Lorenz RR, Shepherd JT, et al: Effect of vibration on a canine cutaneous artery. Am J Physiol (Heart Circ Physiol) 19:H519-H523, 1986.
8.
Aukland K., Bower BF, Berliner RW: Measurement of local blood flow with hydrogen gas. Circ Res14:164-187, 1964.
9.
Ljung B., Sivertsson R.: Vibration-induced inhibition of vascular smooth muscle contration . Blood Vessels12:38-52, 1975.
10.
Joyce GC, Rack Phm, Westbury DR: The mechanical properties of cat soleus muscle during controlled lengthening and shortening movements. J Physiol (Lond) 204:461-474, 1969.
11.
Welsh CL: The effect of vibration on digital blood flow. Br J Surg67:708-710, 1980.
12.
Andersson R. : Role of cyclic AMP and Ca++ in mechanical and metabolic events in isometrically contracting vascular smooth muscle. Acta Physiol Scand87:84-95, 1973.
