Sage Journals: Discover world-class research

Abstract

German

Hydrodynamic pressure-pulses of high intensity (max.40 mbar) or direct vibrations (100–1000 Hz) can reduce the contractile force of isolated smooth and skeletal muscles as well as cardiac muscle preparations. The relaxing effect is probably based on a disturbance of the interaction between the contractile proteins of the myofibrils.

In the rhythmically working total heart only pressure-pulses placed in the systole are effective in respect of negative inotropism. Pressure-pulses applied during diastole induce ventricular extrasystoles.

Repetitive automatism, often leading to ventricular fibrillation, can be provoked by each diastolic pressure-pulse when ischemia combined with subsequent hypoxia is applied to the heart.

Arrhythmias, induced by pressure-pulses, probably originate from rapid distension of stretch-sensitive structures of the heart, mainly Purkinje fibres.

Get full access to this article

View all access options for this article.

References

Cohn

P.F.

Angoff

G.H.

Zoll

P.M.

Sloss

L.J.

Markis

J.E.

Graboys

T.B.

Green

L.H.

Braunwald

A new, noninvasive technique for inducing post-extrasystolic potentiation during echocardiography. Circulation 56, 598 (1977).

Cranefield

P.F.

The slow response and cardiac arrhythmias. In Zipes

D.P.

Bailey

J.C.

Elharrar

The slow inward current and cardiac arrhythmias. Martinus Nijhoff Publ. The Hague, Boston, London 1980.

Damongeot

Freidinger

Criteres d'evaluation des bruits impulsionells industrielle.- Premiers resultats d'une experimentation sur cobayes. 10. Int. Congr. on acoustics, Sydney 9. – 16. 7.1980, Vol.2, C1 – 4.6.

Döring

H.J.

Hauf

Kontraktilität sowie A TP- und Kreatinphosphat-Konzentrationen des Meerschweinchenmyokards bei Normoxie und verschiedenen Hyoxiegraden. Der Einfluss von Strophanthin, Isoproterenol und Kalziumchlorid. Herz/Kreisl. 9, 926 (1977).

Döring

H.J.

Hauf

Seiberling

Effects of high-intensity sound on the contractile function of the isolated ileum of guinea-pigs and rabbits. In: Noise as a Public Health Problem. Proc. 3rd Internat. Congre. 25. – 29.9.1978; ASHA Reports 10 Rockville/Md. 1980.

Dupius

Christ

Über das Schwingungsverhalten des Magens unter dem Einfluss sinusförmiger und stochastischer Schwingungen. Int. Z. angew. Physiol. einschl. Arbeitsphysiol. 22, 149 (1966).

Frey

Döring

H.J.

Experimental induction of ventricular extrasystoles by hydrodynamic pressure waves applied during diastole. A model for discrimination between different antiarrhythmic drugs. Pflügers Arch. Suppl. Vol.391 R 15(1981).

Frey

Nolte

Döring

H.J.

A new experimental model for studying antiarrhythmic drugs with regard to suppression of ventricular extrasystoles induced by application of hydrodynamic pressure waves. – Isolated guinea-pig hearts in normoxia and hypoxia. Arch. Pharmacol. 319, (Suppl.) R 36 (1982).

Ljung

Sivertsson

The inhibitory effect of vibrations on tension development in vascular smooth muscle. Acta physiol. Scand. 85, 428 (1972). Vibration-induced inhibition of vascular smooth muscle contraction. Blood vessels 12, 38(1975).

10.

Sarvazyan

A.P.

Apparent and real thresholds for biological effects of ultrasound. 10. Int. Congr. on acoustics, Sydney 9. – 16.7.1980, Vol.3, F-1.5.

11.

Sieberling

Haap

K.-P.

Döring

H.J.

Restriction of mechanical activity produced by high sound pressures on various muscle types. Experiments with underwater sound or direct vibration on isolated preparations of smooth, cardiac, and skeletal muscle of guinea-pigs, rabbits, and frogs. In: Animals and environmental fitness. 1. ESCPB Conference. Pergamon Press 1979.

12.

Vukas

Malek

Hjalmarson

A.C.

Myocardial depressant effect of vibrations in the isolated rabbit heart. Scand. J. clin. Lab. Invest. 38, 421 (1978).

13.

Zeh

Rahner

Die manuelle extrathorakale Stimulation des Herzens. Zur Technik und Wirkung des “Präkordialschalges”, (1978).

Changes in the Mechanical Activity of Heart,Skeletal and Smooth Muscle Induced by Hydrodynamic Pressure Pulses

Abstract

Get full access to this article

References