Doppler tissue imaging: a noninvasive technique for evaluation of left ventricular relaxation and estimation of filling pressures
SF Nagueh,
KJ Middleton,
HA Kopelen,
WA Zoghbi,
and
MA Quinones
Baylor College of Medicine and Department of Medicine, The Methodist Hospital, Houston, Texas 77030, USA. sherifn@bcm.tmc.edu
OBJECTIVES: This investigation was designed 1) to assess whether the early diastolic velocity of the mitral annulus (Ea) obtained with Doppler tissue imaging (DTI) behaves as a preload-independent index of left ventricular (LV) relaxation; and 2) to evaluate the relation of the mitral E/Ea ratio to LV filling pressures. BACKGROUND: Recent observations suggest that Ea is an index of LV relaxation that is less influenced by LV filling pressures. METHODS: One hundred twenty-five study subjects were classified into three groups according to mitral E/A ratio, LV ejection fraction (LVEF) and clinical symptoms: 34 asymptomatic subjects with a normal LVEF and an E/A ratio > or =1; 40 with a normal LVEF, an E/A ratio <1 and no heart failure symptoms (impaired relaxation [IR]); and 51 with heart failure symptoms and an E/A ratio >1 (pseudonormal [PN]). Ea was derived from the lateral border of the annulus. A subset of 60 patients had invasive measurement of pulmonary capillary wedge pressure (PCWP) simultaneous with Doppler echocardiographic DTI. RESULTS: Ea was reduced in the IR and PN groups compared with the group of normal subjects: 5.8 +/- 1.5 and 5.2 +/- 1.4 vs. 12 +/- 2.8 cm/s, respectively (p < 0.001). Mean PCWP (20 +/- 8 mm Hg) related weakly to mitral E (r = 0.68) but not to Ea. The E/Ea ratio related well to PCWP (r = 0.87; PCWP = 1.24 [E/Ea] + 1.9), with a difference between Doppler and catheter measurements of 0.1 +/- 3.8 mm Hg. CONCLUSIONS: Ea behaves as a preload-independent index of LV relaxation. Mitral E velocity, corrected for the influence of relaxation (i.e., the E/Ea ratio), relates well to mean PCWP and may be used to estimate LV filling pressures.
This article has been cited by other articles:

|
 |

|
 |
 
M. Kayikcioglu, M. Tumuklu, M. Ozkahya, O. Ozdogan, G. Asci, S. Duman, H. Toz, L. H. Can, A. Basci, and E. Ok
The benefit of salt restriction in the treatment of end-stage renal disease by haemodialysis
Nephrol. Dial. Transplant.,
November 11, 2008;
(2008)
gfn599v1.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Manouras, K. Shahgaldi, R. Winter, J. Nowak, and L.-A. Brodin
Comparison between colour-coded and spectral tissue Doppler measurements of systolic and diastolic myocardial velocities: effect of temporal filtering and offline gain setting
Eur J Echocardiogr,
November 6, 2008;
(2008)
jen298v1.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
M. Guazzi, J. Myers, M. A. Peberdy, D. Bensimhon, P. Chase, and R. Arena
Exercise oscillatory breathing in diastolic heart failure: prevalence and prognostic insights
Eur. Heart J.,
November 2, 2008;
29(22):
2751 - 2759.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
L. C. Afonso, J. Bernal, J. J. Bax, and T. P. Abraham
Echocardiography in Hypertrophic Cardiomyopathy: The Role of Conventional and Emerging Technologies
J. Am. Coll. Cardiol. Img.,
November 1, 2008;
1(6):
787 - 800.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
G J King, R T Murphy, I Almuntaser, K Bennett, E Ho, and A S Brown
Alterations in myocardial stiffness in elite athletes assessed by a new Doppler index
Heart,
October 1, 2008;
94(10):
1323 - 1325.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
S. Nottin, G. Doucende, I. Schuster-Beck, M. Dauzat, and P. Obert
Alteration in left ventricular normal and shear strains evaluated by 2D-strain echocardiography in the athlete's heart
J. Physiol.,
October 1, 2008;
586(19):
4721 - 4733.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Sharp, R. Tapp, D. P. Francis, S. A. McG. Thom, A. D. Hughes, A. V. Stanton, A. Zambanini, N. Chaturvedi, S. Byrd, N. R. Poulter, et al.
Ethnicity and Left Ventricular Diastolic Function in Hypertension: An ASCOT (Anglo-Scandinavian Cardiac Outcomes Trial) Substudy
J. Am. Coll. Cardiol.,
September 16, 2008;
52(12):
1015 - 1021.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. L. Baggish, K. Yared, F. Wang, R. B. Weiner, A. M. Hutter Jr., M. H. Picard, and M. J. Wood
The impact of endurance exercise training on left ventricular systolic mechanics
Am J Physiol Heart Circ Physiol,
September 1, 2008;
295(3):
H1109 - H1116.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
N R Van de Veire, J De Sutter, J J Bax, and J R T C Roelandt
Technological advances in tissue Doppler imaging echocardiography
Heart,
August 1, 2008;
94(8):
1065 - 1074.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
I. Barutcu, A. M. Esen, D. Kaya, E. Onrat, M. Melek, A. Celik, C. Kilit, M. Turkmen, O. Karakaya, O. B. Esen, et al.
Effect of Acute Cigarette Smoking on Left and Right Ventricle Filling Parameters: A Conventional and Tissue Doppler Echocardiographic Study in Healthy Participants
Angiology,
July 1, 2008;
59(3):
312 - 316.
[Abstract]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Drighil, J. E. Madias, J. W. Mathewson, H. El Mosalami, N. El Badaoui, B. Ramdani, and A. Bennis
Haemodialysis: effects of acute decrease in preload on tissue Doppler imaging indices of systolic and diastolic function of the left and right ventricles
Eur J Echocardiogr,
July 1, 2008;
9(4):
530 - 535.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Evangelista, F. Flachskampf, P. Lancellotti, L. Badano, R. Aguilar, M. Monaghan, J. Zamorano, P. Nihoyannopoulos, and on behalf of the European Association of Echocardi
European Association of Echocardiography recommendations for standardization of performance, digital storage and reporting of echocardiographic studies
Eur J Echocardiogr,
July 1, 2008;
9(4):
438 - 448.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Y-M. Wang, M. Wang, C. W-K. Lam, I. H-S. Chan, Y. Zhang, and J. E. Sanderson
Left Ventricular Filling Pressure by Doppler Echocardiography in Patients With End-Stage Renal Disease
Hypertension,
July 1, 2008;
52(1):
107 - 114.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
C. E. Veltman, O. I.I. Soliman, M. L. Geleijnse, W. B. Vletter, P. C. Smits, F. J. ten Cate, L. J. Jordaens, A. H.H.M. Balk, P. W. Serruys, E. Boersma, et al.
Four-year follow-up of treatment with intramyocardial skeletal myoblasts injection in patients with ischaemic cardiomyopathy
Eur. Heart J.,
June 1, 2008;
29(11):
1386 - 1396.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
W. Zhang and S. J. Kovacs
The diastatic pressure-volume relationship is not the same as the end-diastolic pressure-volume relationship
Am J Physiol Heart Circ Physiol,
June 1, 2008;
294(6):
H2750 - H2760.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
I. Ikonomidis, J. P. Lekakis, M. Nikolaou, I. Paraskevaidis, I. Andreadou, T. Kaplanoglou, P. Katsimbri, G. Skarantavos, P. N. Soucacos, and D. T. Kremastinos
Inhibition of Interleukin-1 by Anakinra Improves Vascular and Left Ventricular Function in Patients With Rheumatoid Arthritis
Circulation,
May 20, 2008;
117(20):
2662 - 2669.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
J. J.V. McMurray, B. Pitt, R. Latini, A. P. Maggioni, S. D. Solomon, D. L. Keefe, J. Ford, A. Verma, J. Lewsey, and for the Aliskiren Observation of Heart Failure Tre
Effects of the Oral Direct Renin Inhibitor Aliskiren in Patients With Symptomatic Heart Failure
Circ Heart Fail,
May 1, 2008;
1(1):
17 - 24.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
M. Tretjak and M. Kozelj
Tissue Doppler annular velocities, NT-proBNP and exercise capacity in healthy elderly
Age Ageing,
May 1, 2008;
37(3):
336 - 339.
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
G W K Yip, M Wang, T Wang, S Chan, J W H Fung, L Yeung, T Yip, S-T Lau, C-P Lau, M-O Tang, et al.
The Hong Kong diastolic heart failure study: a randomised controlled trial of diuretics, irbesartan and ramipril on quality of life, exercise capacity, left ventricular global and regional function in heart failure with a normal ejection fraction
Heart,
May 1, 2008;
94(5):
573 - 580.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
T. G. Neilan, T.-T. Ton-Nu, Y. Kawase, R. Yoneyama, K. Hoshino, F. del Monte, R. J. Hajjar, M. H. Picard, R. A. Levine, and J. Hung
Progressive nature of chronic mitral regurgitation and the role of tissue Doppler-derived indexes
Am J Physiol Heart Circ Physiol,
May 1, 2008;
294(5):
H2106 - H2111.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
H. M. Ippisch, T. H. Inge, S. R. Daniels, B. Wang, P. R. Khoury, S. A. Witt, B. J. Glascock, V. F. Garcia, and T. R. Kimball
Reversibility of Cardiac Abnormalities in Morbidly Obese Adolescents
J. Am. Coll. Cardiol.,
April 8, 2008;
51(14):
1342 - 1348.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
Y. Zhu, A. O. Gramolini, M. A. Walsh, Y.-Q. Zhou, C. Slorach, M. K. Friedberg, J. K. Takeuchi, H. Sun, R. M. Henkelman, P. H. Backx, et al.
Tbx5-dependent pathway regulating diastolic function in congenital heart disease
PNAS,
April 8, 2008;
105(14):
5519 - 5524.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
C. E. Papadopoulos, G. Pitsiou, T. D. Karamitsos, H. I. Karvounis, T. Kontakiotis, G. Giannakoulas, G. K. Efthimiadis, P. Argyropoulou, G. E. Parharidis, and D. Bouros
Left ventricular diastolic dysfunction in idiopathic pulmonary fibrosis: a tissue Doppler echocardiographic study
Eur. Respir. J.,
April 1, 2008;
31(4):
701 - 706.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
S. Y. Hayashi, A. Seeberger, B. Lind, S. Gunnes, A. Alvestrand, M. M. d. Nascimento, B. Lindholm, and L.-A. Brodin
Acute effects of low and high intravenous doses of furosemide on myocardial function in anuric haemodialysis patients: a tissue Doppler study
Nephrol. Dial. Transplant.,
April 1, 2008;
23(4):
1355 - 1361.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
D. J. Weaver Jr., T. R. Kimball, T. Knilans, W. Mays, S. K. Knecht, Y. M. Gerdes, S. Witt, B. J. Glascock, J. Kartal, P. Khoury, et al.
Decreased Maximal Aerobic Capacity in Pediatric Chronic Kidney Disease
J. Am. Soc. Nephrol.,
March 1, 2008;
19(3):
624 - 630.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
P. Innelli, R. Sanchez, F. Marra, R. Esposito, and M. Galderisi
The impact of aging on left ventricular longitudinal function in healthy subjects: a pulsed tissue Doppler study
Eur J Echocardiogr,
March 1, 2008;
9(2):
241 - 249.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
J.-M. Tartiere, D. Logeart, L. Tartiere-Kesri, and A. Cohen-Solal
Colour tissue Doppler underestimates myocardial velocity as compared to spectral tissue Doppler: Poor reliability between both methods
Eur J Echocardiogr,
March 1, 2008;
9(2):
268 - 272.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
M. Guazzi, R. Arena, and M. D. Guazzi
Evolving changes in lung interstitial fluid content after acute myocardial infarction: mechanisms and pathophysiological correlates
Am J Physiol Heart Circ Physiol,
March 1, 2008;
294(3):
H1357 - H1364.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
S. J. Lester, A. J. Tajik, R. A. Nishimura, J. K. Oh, B. K. Khandheria, and J. B. Seward
Unlocking the Mysteries of Diastolic Function Deciphering the Rosetta Stone 10 Years Later.
J. Am. Coll. Cardiol.,
February 19, 2008;
51(7):
679 - 689.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
G. A. Whalley, S. P. Wright, A. Pearl, G. D. Gamble, H. J. Walsh, M. Richards, and R. N. Doughty
Prognostic role of echocardiography and brain natriuretic peptide in symptomatic breathless patients in the community
Eur. Heart J.,
February 2, 2008;
29(4):
509 - 516.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. J. Kerr, O. C. Raffel, G. A. Whalley, I. Zeng, and R. A. Stewart
Elevated B-type natriuretic peptide despite normal left ventricular function on rest and exercise stress echocardiography in mitral regurgitation
Eur. Heart J.,
February 1, 2008;
29(3):
363 - 370.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
L. Mont, D. Tamborero, R. Elosua, I. Molina, B. Coll-Vinent, M. Sitges, B. Vidal, A. Scalise, A. Tejeira, A. Berruezo, et al.
Physical activity, height, and left atrial size are independent risk factors for lone atrial fibrillation in middle-aged healthy individuals
Europace,
January 4, 2008;
(2008)
eum263v1.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
L. Groban, L. M. Yamaleyeva, B. M. Westwood, T. T. Houle, M. Lin, D. W. Kitzman, and M. C. Chappell
Progressive Diastolic Dysfunction in the Female mRen(2).Lewis Rat: Influence of Salt and Ovarian Hormones
J. Gerontol. A Biol. Sci. Med. Sci.,
January 1, 2008;
63(1):
3 - 11.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. Strand, S.E. Kjeldsen, H. Gudmundsdottir, I. Os, G. Smith, and R. Bjornerheim
Tissue Doppler imaging describes diastolic function in men prone to develop hypertension over twenty years
Eur J Echocardiogr,
January 1, 2008;
9(1):
34 - 39.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
G. Acharya, J. Rasanen, K. Makikallio, T. Erkinaro, T. Kavasmaa, M. Haapsamo, L. Mertens, and J. C. Huhta
Metabolic acidosis decreases fetal myocardial isovolumic velocities in a chronic sheep model of increased placental vascular resistance
Am J Physiol Heart Circ Physiol,
January 1, 2008;
294(1):
H498 - H504.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
J. B. Geske, P. Sorajja, R. A. Nishimura, and S. R. Ommen
Evaluation of Left Ventricular Filling Pressures by Doppler Echocardiography in Patients With Hypertrophic Cardiomyopathy: Correlation With Direct Left Atrial Pressure Measurement at Cardiac Catheterization
Circulation,
December 4, 2007;
116(23):
2702 - 2708.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
T. P. Abraham, V. L. Dimaano, and H.-Y. Liang
Role of Tissue Doppler and Strain Echocardiography in Current Clinical Practice
Circulation,
November 27, 2007;
116(22):
2597 - 2609.
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
S. Huez, F. Roufosse, J-L. Vachiery, A. Pavelescu, G. Derumeaux, J-C. Wautrecht, E. Cogan, and R. Naeije
Isolated right ventricular dysfunction in systemic sclerosis: latent pulmonary hypertension?
Eur. Respir. J.,
November 1, 2007;
30(5):
928 - 936.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
R D Abeles, D L Shawcross, and G Auzinger
E/A ratio alone cannot reliably diagnose diastolic dysfunction in the assessment before and after TIPS
Gut,
November 1, 2007;
56(11):
1642 - 1642.
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
B. A. Borlaug, V. Melenovsky, M. M. Redfield, K. Kessler, H.-J. Chang, T. P. Abraham, and D. A. Kass
Impact of Arterial Load and Loading Sequence on Left Ventricular Tissue Velocities in Humans
J. Am. Coll. Cardiol.,
October 16, 2007;
50(16):
1570 - 1577.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
W. J. Paulus, C. Tschope, J. E. Sanderson, C. Rusconi, F. A. Flachskampf, F. E. Rademakers, P. Marino, O. A. Smiseth, G. De Keulenaer, A. F. Leite-Moreira, et al.
How to diagnose diastolic heart failure: a consensus statement on the diagnosis of heart failure with normal left ventricular ejection fraction by the Heart Failure and Echocardiography Associations of the European Society of Cardiology
Eur. Heart J.,
October 2, 2007;
28(20):
2539 - 2550.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
E. Konduracka, A. Gackowski, P. Rostoff, D. Galicka-Latala, W. Frasik, and W. Piwowarska
Diabetes-specific cardiomyopathy in type 1 diabetes mellitus: no evidence for its occurrence in the era of intensive insulin therapy
Eur. Heart J.,
October 2, 2007;
28(20):
2465 - 2471.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
L. Hatle
How to diagnose diastolic heart failure a consensus statement
Eur. Heart J.,
October 2, 2007;
28(20):
2421 - 2423.
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
J. E.A.K. Bamfo, N. A. Kametas, K. H. Nicolaides, and J. B. Chambers
Maternal left ventricular diastolic and systolic long-axis function during normal pregnancy
Eur J Echocardiogr,
October 1, 2007;
8(5):
360 - 368.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
C-C. Balick-Weber, P. Nicolas, M. Hedreville-Montout, P. Blanchet, and F. Stephan
Respiratory and haemodynamic effects of volume-controlled vs pressure-controlled ventilation during laparoscopy: a cross-over study with echocardiographic assessment
Br. J. Anaesth.,
September 1, 2007;
99(3):
429 - 435.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
S. Chumnanvej, M. J. Wood, T. E. MacGillivray, and M. F. V. Melo
Perioperative Echocardiographic Examination for Ventricular Assist Device Implantation
Anesth. Analg.,
September 1, 2007;
105(3):
583 - 601.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
A. K.Y. Chan, J. E. Sanderson, T. Wang, W. Lam, G. Yip, M. Wang, Y.-Y. Lam, Y. Zhang, L. Yeung, E. B. Wu, et al.
Aldosterone Receptor Antagonism Induces Reverse Remodeling When Added to Angiotensin Receptor Blockade in Chronic Heart Failure
J. Am. Coll. Cardiol.,
August 14, 2007;
50(7):
591 - 596.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
M. Kasner, D. Westermann, P. Steendijk, R. Gaub, U. Wilkenshoff, K. Weitmann, W. Hoffmann, W. Poller, H.-P. Schultheiss, M. Pauschinger, et al.
Utility of Doppler Echocardiography and Tissue Doppler Imaging in the Estimation of Diastolic Function in Heart Failure With Normal Ejection Fraction: A Comparative Doppler-Conductance Catheterization Study
Circulation,
August 7, 2007;
116(6):
637 - 647.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
E. G. Caiani, L. Weinert, M. Takeuchi, F. Veronesi, L. Sugeng, C. Corsi, A. Capderou, S. Cerutti, P. Vaida, and R. M. Lang
Evaluation of alterations on mitral annulus velocities, strain, and strain rates due to abrupt changes in preload elicited by parabolic flight
J Appl Physiol,
July 1, 2007;
103(1):
80 - 87.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
U. Wisloff, A. Stoylen, J. P. Loennechen, M. Bruvold, O. Rognmo, P. M. Haram, A. E. Tjonna, J. Helgerud, S. A. Slordahl, S. J. Lee, et al.
Superior Cardiovascular Effect of Aerobic Interval Training Versus Moderate Continuous Training in Heart Failure Patients: A Randomized Study
Circulation,
June 19, 2007;
115(24):
3086 - 3094.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
R. Pirracchio, B. Cholley, S. De Hert, A. C. Solal, and A. Mebazaa
Diastolic heart failure in anaesthesia and critical care
Br. J. Anaesth.,
June 1, 2007;
98(6):
707 - 721.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
C. Schmidt, J. Frielingsdorf, M. Debrunner, R. Tavakoli, M. Genoni, E. Straumann, O. Bertel, and B. Naegeli
Acute biventricular pacing after cardiac surgery has no influence on regional and global left ventricular systolic function
Europace,
June 1, 2007;
9(6):
432 - 436.
[Abstract]
[Full Text]
[PDF]
|
 |
|

|
 |

|
 |
 
N. C Van Pelt, R. A H Stewart, M. E Legget, G. A Whalley, S. P Wong, I. Zeng, M. Oldfield, and A. J Kerr
Longitudinal left ventricular contractile dysfunction after exercise in aortic stenosis
Heart,
June 1, 2007;
93(6):
732 - 738.
[Abstract]
[Full Text]
[PDF]
|
 |
|
|