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Quantification of left and right atrial kinetic energy using four-dimensional intracardiac magnetic resonance imaging flow measurements.

Arvidsson, Per Martin LU ; Töger, Johannes LU ; Heiberg, Einar LU ; Carlsson, Marcus LU and Arheden, Håkan LU (2013) In Journal of Applied Physiology 114(10). p.1472-1481
Abstract
Kinetic energy (KE) of atrial blood has been postulated as a possible contributor to ventricular filling. Therefore, we aimed to quantify the left and right atrial blood KE using cardiac magnetic resonance (CMR). Fifteen healthy volunteers underwent CMR at 3T, including a four-dimensional phase contrast flow sequence. Mean left atrial (LA) KE was lower than right atrial (RA) KE (1.1±0.1 mJ vs 1.7±0.1 mJ, P<0.01). Three KE peaks were seen in both atria; one in ventricular systole, one during early ventricular diastole, and one during atrial contraction. The systolic LA peak was significantly smaller than the RA peak (P<0.001), and the early diastolic LA peak was larger than the RA peak (P<0.05). Rotational flow contained 46 ± 7% of... (More)
Kinetic energy (KE) of atrial blood has been postulated as a possible contributor to ventricular filling. Therefore, we aimed to quantify the left and right atrial blood KE using cardiac magnetic resonance (CMR). Fifteen healthy volunteers underwent CMR at 3T, including a four-dimensional phase contrast flow sequence. Mean left atrial (LA) KE was lower than right atrial (RA) KE (1.1±0.1 mJ vs 1.7±0.1 mJ, P<0.01). Three KE peaks were seen in both atria; one in ventricular systole, one during early ventricular diastole, and one during atrial contraction. The systolic LA peak was significantly smaller than the RA peak (P<0.001), and the early diastolic LA peak was larger than the RA peak (P<0.05). Rotational flow contained 46 ± 7% of total KE, and conserved energy better than non-rotational flow did. The KE increase in early diastole was higher in the LA (P<0.001). Systolic KE correlated with the combination of atrial volume and systolic velocity of the atrioventricular plane displacement (R2=0.57 for LA and R2=0.64 for RA). Early diastolic KE of the LA correlated with LV mass (R2=0.28), however no such correlation was found in the right heart. This suggests that LA KE increases during early ventricular diastole due to LV elastic recoil, indicating that LV filling is dependent on diastolic suction. RV relaxation does not seem to contribute to atrial KE. Instead, atrial KE generated during ventricular systole may be conserved in a hydraulic "flywheel" and transferred to the RV through helical flow, which may contribute to RV filling. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Physiology
volume
114
issue
10
pages
1472 - 1481
publisher
American Physiological Society
external identifiers
  • wos:000319209700019
  • pmid:23493355
  • scopus:84878595252
ISSN
1522-1601
DOI
10.1152/japplphysiol.00932.2012
language
English
LU publication?
yes
id
33b97ccf-70da-41fd-8e06-27e8c2bb74d2 (old id 3628182)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/23493355?dopt=Abstract
date added to LUP
2016-04-01 11:02:00
date last changed
2022-04-04 23:32:00
@article{33b97ccf-70da-41fd-8e06-27e8c2bb74d2,
  abstract     = {{Kinetic energy (KE) of atrial blood has been postulated as a possible contributor to ventricular filling. Therefore, we aimed to quantify the left and right atrial blood KE using cardiac magnetic resonance (CMR). Fifteen healthy volunteers underwent CMR at 3T, including a four-dimensional phase contrast flow sequence. Mean left atrial (LA) KE was lower than right atrial (RA) KE (1.1±0.1 mJ vs 1.7±0.1 mJ, P&lt;0.01). Three KE peaks were seen in both atria; one in ventricular systole, one during early ventricular diastole, and one during atrial contraction. The systolic LA peak was significantly smaller than the RA peak (P&lt;0.001), and the early diastolic LA peak was larger than the RA peak (P&lt;0.05). Rotational flow contained 46 ± 7% of total KE, and conserved energy better than non-rotational flow did. The KE increase in early diastole was higher in the LA (P&lt;0.001). Systolic KE correlated with the combination of atrial volume and systolic velocity of the atrioventricular plane displacement (R2=0.57 for LA and R2=0.64 for RA). Early diastolic KE of the LA correlated with LV mass (R2=0.28), however no such correlation was found in the right heart. This suggests that LA KE increases during early ventricular diastole due to LV elastic recoil, indicating that LV filling is dependent on diastolic suction. RV relaxation does not seem to contribute to atrial KE. Instead, atrial KE generated during ventricular systole may be conserved in a hydraulic "flywheel" and transferred to the RV through helical flow, which may contribute to RV filling.}},
  author       = {{Arvidsson, Per Martin and Töger, Johannes and Heiberg, Einar and Carlsson, Marcus and Arheden, Håkan}},
  issn         = {{1522-1601}},
  language     = {{eng}},
  number       = {{10}},
  pages        = {{1472--1481}},
  publisher    = {{American Physiological Society}},
  series       = {{Journal of Applied Physiology}},
  title        = {{Quantification of left and right atrial kinetic energy using four-dimensional intracardiac magnetic resonance imaging flow measurements.}},
  url          = {{http://dx.doi.org/10.1152/japplphysiol.00932.2012}},
  doi          = {{10.1152/japplphysiol.00932.2012}},
  volume       = {{114}},
  year         = {{2013}},
}