0
Clinical Investigations: CARDIOLOGY |

Left Ventricular Wall Stress During Leg-Press Exercise Performed With a Brief Valsalva Maneuver*

Mark Haykowsky, PhD; Dylan Taylor, MD; Koon Teo, MB, PhD; Arthur Quinney, PhD; Dennis Humen, MD
Author and Funding Information

*From the Faculty of Physical Education and Recreation (Drs. Haykowsky and Quinney), and Division of Cardiology (Drs. Haykowsky, Taylor, Teo, and Humen), Faculty of Medicine, University of Alberta, Edmonton, Alberta, Canada.

Correspondence to: Mark Haykowsky, PhD, Faculty of Rehabilitation Medicine, 2–50 Corbett Hall, University of Alberta, Edmonton, Alberta, Canada T6G 2G4; e-mail: mark.haykowsky@ualberta.ca



Chest. 2001;119(1):150-154. doi:10.1378/chest.119.1.150
Text Size: A A A
Published online

Study objectives: To assess the effects of leg-press (LP) exercise performed with a brief (2 to 3 s) Valsalva maneuver on left ventricular (LV) systolic function and LV wall stress in five healthy men (mean ± SD age, 27.6 ± 2.9 years).

Methods and measurements: Subjects performed submaximal (80% one repetition maximum [1RM], 337.9 ± 109.1 kg; 95% 1RM, 400.6 ± 129.8 kg) and maximal LP exercise (420 ± 118.6 kg) during which central arterial pressure, intrathoracic pressure, and two-dimensional echocardiographic analysis of LV systolic function and LV wall stress were measured.

Results: Compared with baseline, LP exercise resulted in an increase in intrathoracic pressure (baseline, 1.7 ± 2.9 mm Hg; 80% 1RM, 111.7 ± 20.2 mm Hg; 95% 1RM, 112.2 ± 21.1 mm Hg; 100% 1RM, 111.0 ± 21.3 mm Hg; p < 0.05) and LV end-systolic pressure (baseline, 120.0 ± 13.2 mm Hg; 80% 1RM, 251.6 ± 15.3 mm Hg; 95% 1RM, 255.3 ± 12.2 mm Hg; 100% 1RM, 242.8 ± 16.5 mm Hg; p < 0.05) with no changes in LV end-systolic transmural pressure (baseline, 118.3 ± 12.6 mm Hg; 80% 1RM, 140.0 ± 6.1 mm Hg; 95% 1RM, 143.1 ± 16.1 mm Hg; 100% 1RM, 131.8 ± 29.7 mm Hg; p > 0.05), LV end-systolic wall stress (baseline, 91.7 ± 20.2 kilodyne/cm2; 80% 1RM, 78.0 ± 24.4 kilodyne/cm2; 95% 1RM, 81.4 ± 25.3 kilodyne/cm2; 100% 1RM, 85.9 ± 20.1 kilodyne/cm2; p > 0.05), or LV fractional area change (baseline, 0.48 ± 0.03; 80% 1RM, 0.52 ± 0.11; 95% 1RM, 0.53 ± 0.06; 100% 1RM, 0.52 ± 0.05; p > 0.05).

Conclusion: LP exercise performed with a brief Valsalva maneuver is not associated with an alteration in LV wall stress or LV systolic function in healthy young men.

Figures in this Article

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Figures

Tables

References

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Find Similar Articles
CHEST Journal Articles
PubMed Articles
Guidelines
  • CHEST Journal
    Print ISSN: 0012-3692
    Online ISSN: 1931-3543