Skip to main content
Erschienen in: Sports Medicine 15/2002

01.12.2002 | Review Article

Doppler Echocardiography for the Estimation of Cardiac Output with Exercise

verfasst von: Thomas Rowland, Philippe Obert

Erschienen in: Sports Medicine | Ausgabe 15/2002

Einloggen, um Zugang zu erhalten

Abstract

Insights into both normal and pathological cardiac responses to exercise have been hampered by lack of a safe, accurate, feasible means of estimating cardiac output (.Q) during high-intensity and maximal exercise. Doppler ultrasound noninvasively measures blood velocity as it exits the heart and can be performed during exhaustive exercise without interference of the subject or need for steady state. From the product of aortic blood velocity and cross-sectional area of the aorta, stroke volume (SV) can be calculated. Despite these advantages of the Doppler technique, a number of potential sources of error have raised concern regarding the accuracy of this method. These include transducer angulation, change in aortic cross-sectional area during exercise, turbulence and alteration of a flat velocity profile in the aorta with increased.Q, and uncertainties regarding the proper location for measurement of aortic outflow area.
The magnitude of the influence of these potentially confounding variables on the accuracy of SV measurements determined by the Doppler technique is unknown. Estimates of both construct and concurrent validity suggest that the overall error may be small. Test-retest studies have indicated a high level of reliability with this technique.
Literatur
1.
Zurück zum Zitat Warburton DER, Haykowski MJF, Quinney A, et al. Reliability and validity of measures of cardiac output during incremental to maximal aerobic exercise. Part 1: conventional techniques. Sports Med 1999; 27: 23–41PubMedCrossRef Warburton DER, Haykowski MJF, Quinney A, et al. Reliability and validity of measures of cardiac output during incremental to maximal aerobic exercise. Part 1: conventional techniques. Sports Med 1999; 27: 23–41PubMedCrossRef
2.
Zurück zum Zitat Driscoll DJ, Staats BA, Beck KC. Measurement of cardiac output in children during exercise: a review. Pediatr Exerc Sci 1989; 1: 102–15 Driscoll DJ, Staats BA, Beck KC. Measurement of cardiac output in children during exercise: a review. Pediatr Exerc Sci 1989; 1: 102–15
3.
Zurück zum Zitat Feigenbaum H. Echocardiography. 5th ed. Philadelphia (PA): Lea & Febiger, 1994 Feigenbaum H. Echocardiography. 5th ed. Philadelphia (PA): Lea & Febiger, 1994
4.
Zurück zum Zitat Daley PJ, Sagar KB, Wann LS. Doppler echocardiographic measurement of flow velocity in the ascending aorta during supine and upright exercise. Br Heart J 1985; 54: 562–7PubMedCrossRef Daley PJ, Sagar KB, Wann LS. Doppler echocardiographic measurement of flow velocity in the ascending aorta during supine and upright exercise. Br Heart J 1985; 54: 562–7PubMedCrossRef
5.
Zurück zum Zitat Cortes RGS, Satomi G, Yoshigi M, et al. Maximal hemodynamic response after the Fontan procedure: Doppler evaluation during the treadmill test. Pediatr Cardiol 1994; 15: 170–7PubMedCrossRef Cortes RGS, Satomi G, Yoshigi M, et al. Maximal hemodynamic response after the Fontan procedure: Doppler evaluation during the treadmill test. Pediatr Cardiol 1994; 15: 170–7PubMedCrossRef
6.
Zurück zum Zitat Christie J, Sheldahl LM, Tristani FE, et al. Determination of stroke volume and cardiac output during exercise: comparison of two-dimensional and Doppler echocardiography, Fick oximetry, and thermodilution. Circulation 1987; 76: 539–47PubMedCrossRef Christie J, Sheldahl LM, Tristani FE, et al. Determination of stroke volume and cardiac output during exercise: comparison of two-dimensional and Doppler echocardiography, Fick oximetry, and thermodilution. Circulation 1987; 76: 539–47PubMedCrossRef
7.
Zurück zum Zitat Rowland TW, Lisowski R. Determinants of diastolic cardiac filling during exercise. J Sports Med Phys Fitness. In press Rowland TW, Lisowski R. Determinants of diastolic cardiac filling during exercise. J Sports Med Phys Fitness. In press
8.
Zurück zum Zitat Takahasi T, Miyamoto Y. Influence of light physical activity on cardiac responses during recovery from exercise in humans. Eur J Appl Physiol 1998; 77: 305–11CrossRef Takahasi T, Miyamoto Y. Influence of light physical activity on cardiac responses during recovery from exercise in humans. Eur J Appl Physiol 1998; 77: 305–11CrossRef
9.
Zurück zum Zitat Schuster AH, Nanda NC. Doppler echocardiographic measurement of cardiac output: comparison with a non-golden standard. Am J Cardiol 1984; 53: 257–9PubMedCrossRef Schuster AH, Nanda NC. Doppler echocardiographic measurement of cardiac output: comparison with a non-golden standard. Am J Cardiol 1984; 53: 257–9PubMedCrossRef
10.
Zurück zum Zitat Stewart WJ, Jiang L, Mich R, et al. Variable effect of changes in flow rate through the aortic, pulmonary and mitral valves on valve area and flow velocity: impact on quantitative Doppler flow calculations. J Am Coll Cardiol 1985; 6: 653–62PubMedCrossRef Stewart WJ, Jiang L, Mich R, et al. Variable effect of changes in flow rate through the aortic, pulmonary and mitral valves on valve area and flow velocity: impact on quantitative Doppler flow calculations. J Am Coll Cardiol 1985; 6: 653–62PubMedCrossRef
11.
Zurück zum Zitat Steingart RM, Meller J, Barovick J, et al. Pulsed Doppler echocardiographic measurements of beat-to-beat changes in stroke volume in dogs. Circulation 1980; 62: 542–8PubMedCrossRef Steingart RM, Meller J, Barovick J, et al. Pulsed Doppler echocardiographic measurements of beat-to-beat changes in stroke volume in dogs. Circulation 1980; 62: 542–8PubMedCrossRef
12.
Zurück zum Zitat Lewis JF, Kuo LC, Nelson JG, et al. Pulsed Doppler echocardiographic determination of stroke volume and cardiac output: clinical validation of two new methods using the apical window. Circulation 1984; 70: 425–31PubMedCrossRef Lewis JF, Kuo LC, Nelson JG, et al. Pulsed Doppler echocardiographic determination of stroke volume and cardiac output: clinical validation of two new methods using the apical window. Circulation 1984; 70: 425–31PubMedCrossRef
13.
Zurück zum Zitat Darsee JR, Walter PF, Nutter DO. Transcutaneous Doppler method of measuring cardiac output. Am J Cardiol 1980; 46: 613–8PubMedCrossRef Darsee JR, Walter PF, Nutter DO. Transcutaneous Doppler method of measuring cardiac output. Am J Cardiol 1980; 46: 613–8PubMedCrossRef
14.
Zurück zum Zitat Esperson K, Jensen EW, Rosenborg D, et al. Comparison of cardiac output measurement techniques: thermodilution, Doppler, CO2 rebreathing, and the direct Fick method. Acta Anaesthesiol Scand 1995; 39: 245–51CrossRef Esperson K, Jensen EW, Rosenborg D, et al. Comparison of cardiac output measurement techniques: thermodilution, Doppler, CO2 rebreathing, and the direct Fick method. Acta Anaesthesiol Scand 1995; 39: 245–51CrossRef
15.
Zurück zum Zitat Warburton DER, Haykowski MJF, Quinney HA, et al. Reliability and validity measures of cardiac output during incremental to maximal exercise. Part II: novel techniques and new advances. Sports Med 1999; 27: 241–60PubMedCrossRef Warburton DER, Haykowski MJF, Quinney HA, et al. Reliability and validity measures of cardiac output during incremental to maximal exercise. Part II: novel techniques and new advances. Sports Med 1999; 27: 241–60PubMedCrossRef
16.
Zurück zum Zitat Sjoberg BJ, Wranne B. Cardiac output determined by ultrasound Doppler: clinical applications. Clin Physiol 1990; 10: 463–73PubMedCrossRef Sjoberg BJ, Wranne B. Cardiac output determined by ultrasound Doppler: clinical applications. Clin Physiol 1990; 10: 463–73PubMedCrossRef
17.
Zurück zum Zitat Taylor SH, Shillingford JP. Clinical application of Coomassie blue. Br Heart J 1959; 21: 497–504PubMedCrossRef Taylor SH, Shillingford JP. Clinical application of Coomassie blue. Br Heart J 1959; 21: 497–504PubMedCrossRef
18.
Zurück zum Zitat Reddy PS, Curtiss EI, Bell B, et al. Determinants of variation between Fick and indicator estimates of cardiac output during diagnostic catheterization: Fick vs dye cardiac outputs. J Lab Clin Med 1976; 87: 568–76PubMed Reddy PS, Curtiss EI, Bell B, et al. Determinants of variation between Fick and indicator estimates of cardiac output during diagnostic catheterization: Fick vs dye cardiac outputs. J Lab Clin Med 1976; 87: 568–76PubMed
19.
Zurück zum Zitat Nottin S, Vinet A, Lecoq A-M, et al. Test-retest reproducibility of submaximal and maximal cardiac output by Doppler echocardiography and CO2 rebreathing in prepubertal children. Pediatr Exerc Sci 2001; 13: 214–24 Nottin S, Vinet A, Lecoq A-M, et al. Test-retest reproducibility of submaximal and maximal cardiac output by Doppler echocardiography and CO2 rebreathing in prepubertal children. Pediatr Exerc Sci 2001; 13: 214–24
20.
Zurück zum Zitat Rowland TW, Popowski B. Comparison of bioimpedance and Doppler cardiac output during exercise in children [abstract]. Pediatr Exerc Sci 1996; 9: 188–9 Rowland TW, Popowski B. Comparison of bioimpedance and Doppler cardiac output during exercise in children [abstract]. Pediatr Exerc Sci 1996; 9: 188–9
21.
Zurück zum Zitat Lock JE, Einzig S, Moller JH. Hemodynamic responses to exercise in normal children. Am J Cardiol 1978; 41: 1278–84PubMedCrossRef Lock JE, Einzig S, Moller JH. Hemodynamic responses to exercise in normal children. Am J Cardiol 1978; 41: 1278–84PubMedCrossRef
22.
Zurück zum Zitat Ekelund LG, Holmgren A. Central hemodynamics during exercise. Circ Res 1967; 20 Suppl. 1: I33–43 Ekelund LG, Holmgren A. Central hemodynamics during exercise. Circ Res 1967; 20 Suppl. 1: I33–43
23.
Zurück zum Zitat Malmborg RO. Clinical and hemodynamic analysis of factors limiting the cardiac performance in patients with coronary heart disease. Acta Med Scand 1965; 177 Suppl. 126: 1–30 Malmborg RO. Clinical and hemodynamic analysis of factors limiting the cardiac performance in patients with coronary heart disease. Acta Med Scand 1965; 177 Suppl. 126: 1–30
24.
Zurück zum Zitat Liu Y, Menold E, Duilenkopf A, et al. Validation of the acetylene rebreathing method for measurement of cardiac output at rest and during high intensity exercise. Clin Physiol 1997; 17: 171–82PubMedCrossRef Liu Y, Menold E, Duilenkopf A, et al. Validation of the acetylene rebreathing method for measurement of cardiac output at rest and during high intensity exercise. Clin Physiol 1997; 17: 171–82PubMedCrossRef
25.
Zurück zum Zitat Bar-Or O, Shephard RJ, Allen CL. Cardiac output of 10- to 13-year-old boys and girls during submaximal exercise. J Appl Physiol 1971; 30: 219–23PubMed Bar-Or O, Shephard RJ, Allen CL. Cardiac output of 10- to 13-year-old boys and girls during submaximal exercise. J Appl Physiol 1971; 30: 219–23PubMed
26.
Zurück zum Zitat Turley KR, Wilmore JH. Cardiovascular responses to treadmill and cycle ergometer exercise in children and adults. J Appl Physiol 1997; 83: 948–57PubMed Turley KR, Wilmore JH. Cardiovascular responses to treadmill and cycle ergometer exercise in children and adults. J Appl Physiol 1997; 83: 948–57PubMed
27.
Zurück zum Zitat Marx GR, Hicks RW, Allen HD. Measurement of cardiac output and exercise factor by pulsed Doppler echocardiography during supine bicycle ergometry in normal young adolescent boys. J Am Coll Cardiol 1987; 10: 430–4PubMedCrossRef Marx GR, Hicks RW, Allen HD. Measurement of cardiac output and exercise factor by pulsed Doppler echocardiography during supine bicycle ergometry in normal young adolescent boys. J Am Coll Cardiol 1987; 10: 430–4PubMedCrossRef
28.
Zurück zum Zitat Rowland T, Popowski B, Ferrone L. Cardiac responses to maximal upright cycle exercise in healthy boys and men. Med Sci Sports Exerc 1997; 29: 1146–51PubMedCrossRef Rowland T, Popowski B, Ferrone L. Cardiac responses to maximal upright cycle exercise in healthy boys and men. Med Sci Sports Exerc 1997; 29: 1146–51PubMedCrossRef
29.
Zurück zum Zitat Nottin S, Agnes V, Stecken F, et al. Central and peripheral cardiovascular adaptations during maximal cycle exercise in boys and men. Med Sci Sports Exerc 2002; 33: 456–63 Nottin S, Agnes V, Stecken F, et al. Central and peripheral cardiovascular adaptations during maximal cycle exercise in boys and men. Med Sci Sports Exerc 2002; 33: 456–63
30.
Zurück zum Zitat Vinet A, Nottin S, Lecoq A-M, et al. Cardiovascular responses to progressive cycle exercise in healthy children and adults. Int J Sports Med. In press Vinet A, Nottin S, Lecoq A-M, et al. Cardiovascular responses to progressive cycle exercise in healthy children and adults. Int J Sports Med. In press
31.
Zurück zum Zitat Miyamura M, Honda Y. Maximum cardiac output related to sex and age. Jap J Physiol 1973; 23: 645–56CrossRef Miyamura M, Honda Y. Maximum cardiac output related to sex and age. Jap J Physiol 1973; 23: 645–56CrossRef
32.
Zurück zum Zitat Eriksson BO, Koch G. Effect of physical training on hemodynamic response during submaximal and maximal exercise in 11–13 year old boys. Acta Physiol Scand 1973; 87: 27–39PubMedCrossRef Eriksson BO, Koch G. Effect of physical training on hemodynamic response during submaximal and maximal exercise in 11–13 year old boys. Acta Physiol Scand 1973; 87: 27–39PubMedCrossRef
33.
Zurück zum Zitat Yamaji K, Miyashita M. Oxygen transport during exhaustive exercise in Japanese boys. Eur J Appl Physiol 1977; 36: 93–9CrossRef Yamaji K, Miyashita M. Oxygen transport during exhaustive exercise in Japanese boys. Eur J Appl Physiol 1977; 36: 93–9CrossRef
34.
Zurück zum Zitat Rosenthal M, Bush A. Haemodynamics in children during rest and exercise: methods and normal values. Eur Respir J 1998; 11: 854–6PubMedCrossRef Rosenthal M, Bush A. Haemodynamics in children during rest and exercise: methods and normal values. Eur Respir J 1998; 11: 854–6PubMedCrossRef
35.
Zurück zum Zitat Rowland TW, Blum JW. Cardiac dynamics during upright cycle exercise in boys. Am J Hum Biol 2000; 12: 749–57PubMedCrossRef Rowland TW, Blum JW. Cardiac dynamics during upright cycle exercise in boys. Am J Hum Biol 2000; 12: 749–57PubMedCrossRef
36.
Zurück zum Zitat Rowland TW, Kline G, Goff D, et al. One mile run performance and cardiovascular fitness in children. Arch Pediatr Adolesc Med 1999; 153: 845–9PubMedCrossRef Rowland TW, Kline G, Goff D, et al. One mile run performance and cardiovascular fitness in children. Arch Pediatr Adolesc Med 1999; 153: 845–9PubMedCrossRef
37.
Zurück zum Zitat Shaw GS, Johnson EC, Voyles WF, et al. Noninvasive Doppler determination of cardiac output during submaximal and peak exercise. J Appl Physiol 1985; 59: 722–31PubMed Shaw GS, Johnson EC, Voyles WF, et al. Noninvasive Doppler determination of cardiac output during submaximal and peak exercise. J Appl Physiol 1985; 59: 722–31PubMed
38.
Zurück zum Zitat Bevegard S, Freyschuss U, Strandell T. Circulatory adaptation to arm and leg exercise in supine and sitting position. J Appl Physiol 1966; 21: 37–46PubMed Bevegard S, Freyschuss U, Strandell T. Circulatory adaptation to arm and leg exercise in supine and sitting position. J Appl Physiol 1966; 21: 37–46PubMed
39.
Zurück zum Zitat Stenberg J, Astrand P-O, Ekblom B, et al. Hemodynamic response to work with different muscle groups, sitting and supine. J Appl Physiol 1967; 22: 61–70PubMed Stenberg J, Astrand P-O, Ekblom B, et al. Hemodynamic response to work with different muscle groups, sitting and supine. J Appl Physiol 1967; 22: 61–70PubMed
40.
Zurück zum Zitat Vinet A, Nottin S, Lecoq A-M, et al. Reproducibility of cardiac output measurements by Doppler echocardiography in prepubertal children and adults. Int J Sports Med 2000; 22: 1–5 Vinet A, Nottin S, Lecoq A-M, et al. Reproducibility of cardiac output measurements by Doppler echocardiography in prepubertal children and adults. Int J Sports Med 2000; 22: 1–5
41.
Zurück zum Zitat Rowland TW, Melanson EL, Popowski BE, et al. Test-retest reproducibility of maximum cardiac output by Doppler echocardiography. Am J Cardiol 1998; 81: 1228–9PubMedCrossRef Rowland TW, Melanson EL, Popowski BE, et al. Test-retest reproducibility of maximum cardiac output by Doppler echocardiography. Am J Cardiol 1998; 81: 1228–9PubMedCrossRef
42.
Zurück zum Zitat Mouliner L, Venet T, Schiller NB, et al. Measurement of aortic blood flow by Doppler echocardiography: day to day variability in normal subjects and applicability in clinical research. J Am Coll Cardiol 1991; 17: 1326–33CrossRef Mouliner L, Venet T, Schiller NB, et al. Measurement of aortic blood flow by Doppler echocardiography: day to day variability in normal subjects and applicability in clinical research. J Am Coll Cardiol 1991; 17: 1326–33CrossRef
43.
Zurück zum Zitat Ihlen H, Endresen K, Myreng Y, et al. Reproducibility of cardiac stroke volume estimated by Doppler echocardiography. Am J Cardiol 1987; 59: 975–8PubMedCrossRef Ihlen H, Endresen K, Myreng Y, et al. Reproducibility of cardiac stroke volume estimated by Doppler echocardiography. Am J Cardiol 1987; 59: 975–8PubMedCrossRef
44.
Zurück zum Zitat Nicolosi GL, Pungercic E, Cervesato E, et al. Feasibility and variability of six methods for the echocardiographic and Doppler determination of cardiac output. Br Heart J 1988; 59: 299–303PubMedCrossRef Nicolosi GL, Pungercic E, Cervesato E, et al. Feasibility and variability of six methods for the echocardiographic and Doppler determination of cardiac output. Br Heart J 1988; 59: 299–303PubMedCrossRef
45.
Zurück zum Zitat Gardin JM, Tobis JM, Dabestani A, et al. Superiority of two dimensional measurement of aortic vessel diameter in Doppler echocardiographic estimates of left ventricular stroke volume. J Am Coll Cardiol 1985; 6: 66–74PubMedCrossRef Gardin JM, Tobis JM, Dabestani A, et al. Superiority of two dimensional measurement of aortic vessel diameter in Doppler echocardiographic estimates of left ventricular stroke volume. J Am Coll Cardiol 1985; 6: 66–74PubMedCrossRef
46.
Zurück zum Zitat Huntsman LL, Stewart DK, Barnes SR, et al. Noninvasive Doppler determination of cardiac output in man. Circulation 1983; 67: 593–602PubMedCrossRef Huntsman LL, Stewart DK, Barnes SR, et al. Noninvasive Doppler determination of cardiac output in man. Circulation 1983; 67: 593–602PubMedCrossRef
47.
Zurück zum Zitat Ihlen H, Amlie JP, Dale J, et al. Determination of cardiac output by Doppler echocardiography. Br Heart J 1984; 51: 54–60PubMedCrossRef Ihlen H, Amlie JP, Dale J, et al. Determination of cardiac output by Doppler echocardiography. Br Heart J 1984; 51: 54–60PubMedCrossRef
48.
Zurück zum Zitat Roman MJ, Devereux RB, Kramer-Fox R, et al. Two-dimensional echocardiographic aortic root dimensions in normal children and adults. Am J Cardiol 1989; 64: 507–12PubMedCrossRef Roman MJ, Devereux RB, Kramer-Fox R, et al. Two-dimensional echocardiographic aortic root dimensions in normal children and adults. Am J Cardiol 1989; 64: 507–12PubMedCrossRef
49.
Zurück zum Zitat Morrow WR, Murphy DJ, Fisher DJ, et al. Continuous wave Doppler cardiac output: use in pediatric patients receiving inotropic support. Pediatr Cardiol 1988; 9: 131–6PubMedCrossRef Morrow WR, Murphy DJ, Fisher DJ, et al. Continuous wave Doppler cardiac output: use in pediatric patients receiving inotropic support. Pediatr Cardiol 1988; 9: 131–6PubMedCrossRef
50.
Zurück zum Zitat Greenfield JC, Patel DJ. Relation between pressure and diameter in the ascending aorta in man. Circ Res 1962; 10: 778–81PubMedCrossRef Greenfield JC, Patel DJ. Relation between pressure and diameter in the ascending aorta in man. Circ Res 1962; 10: 778–81PubMedCrossRef
51.
Zurück zum Zitat Imura T, Yamamoto K, Kanamori K, et al. Non-invasive ultrasonic measurement of the elastic properties of the human abdominal aorta. Cardiovasc Res 1986; 20: 208–14PubMedCrossRef Imura T, Yamamoto K, Kanamori K, et al. Non-invasive ultrasonic measurement of the elastic properties of the human abdominal aorta. Cardiovasc Res 1986; 20: 208–14PubMedCrossRef
52.
Zurück zum Zitat Loeber CP, Goldberg SJ, Marx GR, et al. How much does aortic and pulmonary artery area vary during the cardiac cycle? Am Heart J 1987; 113: 95–100PubMedCrossRef Loeber CP, Goldberg SJ, Marx GR, et al. How much does aortic and pulmonary artery area vary during the cardiac cycle? Am Heart J 1987; 113: 95–100PubMedCrossRef
53.
Zurück zum Zitat Davison WR, Pasquale MJ, Fanelli C. A Doppler echocardiographic examination of the normal aortic valve and left ventricular outflow tract. Am J Cardiol 1991; 67: 547–9CrossRef Davison WR, Pasquale MJ, Fanelli C. A Doppler echocardiographic examination of the normal aortic valve and left ventricular outflow tract. Am J Cardiol 1991; 67: 547–9CrossRef
54.
Zurück zum Zitat Rossvoll O, Samstad S, Torp HG, et al. The velocity distribution in the aortic anulus in normal subjects: a quantitative analysis of two-dimensional Doppler flow maps. J Am Soc Echocardiogr 1991; 4: 367–78PubMed Rossvoll O, Samstad S, Torp HG, et al. The velocity distribution in the aortic anulus in normal subjects: a quantitative analysis of two-dimensional Doppler flow maps. J Am Soc Echocardiogr 1991; 4: 367–78PubMed
55.
Zurück zum Zitat Lucas CL, Keagy BA, Hsiao HS, et al. The velocity profile in the canine ascending aorta and its effects on the accuracy of pulsed Doppler determinations of mean blood velocity. Cardiovasc Res 1984; 18: 282–93PubMedCrossRef Lucas CL, Keagy BA, Hsiao HS, et al. The velocity profile in the canine ascending aorta and its effects on the accuracy of pulsed Doppler determinations of mean blood velocity. Cardiovasc Res 1984; 18: 282–93PubMedCrossRef
56.
57.
Zurück zum Zitat Mathison M, Furuse A, Asano K, et al. Doppler analysis of flow velocity profile at the aortic root. J Am Coll Cardiol 1988; 12: 947–54PubMedCrossRef Mathison M, Furuse A, Asano K, et al. Doppler analysis of flow velocity profile at the aortic root. J Am Coll Cardiol 1988; 12: 947–54PubMedCrossRef
58.
Zurück zum Zitat Falsetti HL, Carroll RJ, Swope RD. Turbulent blood flow in the ascending aorta of dogs. Cardiovasc Res 1983; 17: 427–36PubMedCrossRef Falsetti HL, Carroll RJ, Swope RD. Turbulent blood flow in the ascending aorta of dogs. Cardiovasc Res 1983; 17: 427–36PubMedCrossRef
59.
Zurück zum Zitat Loeppky JA, Greene ER, Hoekenga DE, et al. Beat-by-beat stroke volume assessment by pulsed Doppler in upright and supine exercise. J Appl Physiol 1981; 50: 1173–82PubMed Loeppky JA, Greene ER, Hoekenga DE, et al. Beat-by-beat stroke volume assessment by pulsed Doppler in upright and supine exercise. J Appl Physiol 1981; 50: 1173–82PubMed
60.
Zurück zum Zitat Berne RM, Levy MN. Cardiovascular physiology. 8th ed. St Louis (MO): Mosby, 2001 Berne RM, Levy MN. Cardiovascular physiology. 8th ed. St Louis (MO): Mosby, 2001
Metadaten
Titel
Doppler Echocardiography for the Estimation of Cardiac Output with Exercise
verfasst von
Thomas Rowland
Philippe Obert
Publikationsdatum
01.12.2002
Verlag
Springer International Publishing
Erschienen in
Sports Medicine / Ausgabe 15/2002
Print ISSN: 0112-1642
Elektronische ISSN: 1179-2035
DOI
https://doi.org/10.2165/00007256-200232150-00002

Arthropedia

Grundlagenwissen der Arthroskopie und Gelenkchirurgie. Erweitert durch Fallbeispiele, Videos und Abbildungen. 
» Jetzt entdecken

TEP mit Roboterhilfe führt nicht zu größerer Zufriedenheit

15.05.2024 Knie-TEP Nachrichten

Der Einsatz von Operationsrobotern für den Einbau von Totalendoprothesen des Kniegelenks hat die Präzision der Eingriffe erhöht. Für die postoperative Zufriedenheit der Patienten scheint das aber unerheblich zu sein, wie eine Studie zeigt.

Lever-Sign-Test hilft beim Verdacht auf Kreuzbandriss

15.05.2024 Vordere Kreuzbandruptur Nachrichten

Mit dem Hebelzeichen-Test lässt sich offenbar recht zuverlässig feststellen, ob ein vorderes Kreuzband gerissen ist. In einer Metaanalyse war die Vorhersagekraft vor allem bei positivem Testergebnis hoch.

Ein Drittel der jungen Ärztinnen und Ärzte erwägt abzuwandern

07.05.2024 Klinik aktuell Nachrichten

Extreme Arbeitsverdichtung und kaum Supervision: Dr. Andrea Martini, Sprecherin des Bündnisses Junge Ärztinnen und Ärzte (BJÄ) über den Frust des ärztlichen Nachwuchses und die Vorteile des Rucksack-Modells.

Aquatherapie bei Fibromyalgie wirksamer als Trockenübungen

03.05.2024 Fibromyalgiesyndrom Nachrichten

Bewegungs-, Dehnungs- und Entspannungsübungen im Wasser lindern die Beschwerden von Patientinnen mit Fibromyalgie besser als das Üben auf trockenem Land. Das geht aus einer spanisch-brasilianischen Vergleichsstudie hervor.

Update Orthopädie und Unfallchirurgie

Bestellen Sie unseren Fach-Newsletter und bleiben Sie gut informiert.