BACKGROUND: Annular motion (AM) has been shown to occur during all dynamic phases of the cardiac cycle; but little is known regarding comparisons between mitral and tricuspid AM. We elected to use M-mode to examine the extent and timing of mitral and tricuspid AM events. METHODS: A complete echocardiogram was obtained in 50 patients [mean age 53 +/- 16 years, mean left ventricular ejection fraction (LVEF) 57 +/- 19%, and mean right ventricular fractional area change (RVFAC) of 49 +/- 20%]. Timing of all AM intervals was corrected for heart rate. RESULTS: A strong linear correlation was noted for both LVEF and maximal mitral annular systolic excursion and for RVFAC and maximal tricuspid annular systolic excursion (r = 0.91, P < 0.0001). The amplitude of both maximal mitral annular descent (1.54 +/- 0.45 cm) and ascent (0.64 +/- 0.23 cm) was significantly smaller than for the tricuspid annulus (2.26 +/- 0.73 and 0.98 +/- 0.37 cm; P < 0.0001, respectively). Furthermore, while it takes longer for the mitral than for the tricuspid annulus (403 +/- 52 ms vs 308 +/- 50 ms; P < 0.0001, respectively) to descend to its lowest point; the duration to reach maximal ascent is shorter for the mitral than for tricuspid annulus (90 +/- 22 ms vs 115 +/- 19 ms; p < 0.0001, respectively). CONCLUSION: Significant differences exist in both amplitude and timing of AM events between the mitral and tricuspid annuli, likely reflecting intrinsic anatomical and electromechanical differences between both sides of the heart that require further investigation.
BACKGROUND: Annular motion (AM) has been shown to occur during all dynamic phases of the cardiac cycle; but little is known regarding comparisons between mitral and tricuspid AM. We elected to use M-mode to examine the extent and timing of mitral and tricuspid AM events. METHODS: A complete echocardiogram was obtained in 50 patients [mean age 53 +/- 16 years, mean left ventricular ejection fraction (LVEF) 57 +/- 19%, and mean right ventricular fractional area change (RVFAC) of 49 +/- 20%]. Timing of all AM intervals was corrected for heart rate. RESULTS: A strong linear correlation was noted for both LVEF and maximal mitral annular systolic excursion and for RVFAC and maximal tricuspid annular systolic excursion (r = 0.91, P < 0.0001). The amplitude of both maximal mitral annular descent (1.54 +/- 0.45 cm) and ascent (0.64 +/- 0.23 cm) was significantly smaller than for the tricuspid annulus (2.26 +/- 0.73 and 0.98 +/- 0.37 cm; P < 0.0001, respectively). Furthermore, while it takes longer for the mitral than for the tricuspid annulus (403 +/- 52 ms vs 308 +/- 50 ms; P < 0.0001, respectively) to descend to its lowest point; the duration to reach maximal ascent is shorter for the mitral than for tricuspid annulus (90 +/- 22 ms vs 115 +/- 19 ms; p < 0.0001, respectively). CONCLUSION: Significant differences exist in both amplitude and timing of AM events between the mitral and tricuspid annuli, likely reflecting intrinsic anatomical and electromechanical differences between both sides of the heart that require further investigation.
Authors: Hala Mounir Agha; Hossam Ibrahim; Inas Abd El Satar; Naglae Abd El Rahman; Doaa Abd El Aziz; Zeinab Salah; Sonia El Saeidi; Fatma Mostafa; Wael Attia; Mohamed Abd El Rahman; Gaser Abd El Mohsen Journal: Pediatr Cardiol Date: 2017-03-18 Impact factor: 1.655
Authors: Paolo Giovanardi; Enrico Tincani; Rosario Rossi; Virginia Agnoletto; Marco Bondi; Maria Grazia Modena Journal: Intern Emerg Med Date: 2011-02-03 Impact factor: 3.397