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2. Elicitation of heart rate and blood pressure increase on muscle contraction;Freyschuss, U.;Journal of Applied Physiology,(197ob).
3. Effect of sustained isometric handgrip exercise on left ventricular performance;Helfant, R.H.; deVilla, M.A.; Meister, S.G.;Circulation,1971
4. Quantification of the contractile state of the intact human heart;Mason, D.T.; Spann, J.F.; Zelis, R.;American Journal of Cardiology,1970
5. Use of isometric handgrip for the indirect assessment of left ventricular function in patients with coronary atherosclerotic heart disease;Siegel, W.; Gilbert, C.A.; Nutter, D.O.; Schlant, R.O.; Hurst, J.W.;American Journal of Cardiology,1972