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The high prevalence of left ventricular systolic segmental asynchrony in the newly diagnosed and uncomplicated essential hypertension with normal QRS duration
가톨릭의과대학교 심장내과
권범준, 장성원, 김동빈, 정욱성, 이만형, 승기배, 노태호, 김재형
Background: The prevalence of asynchrony in the newly diagnosed, uncomplicated essential hypertension has not been explored. Methods: 45 hypertensive and 15 control individuals underwent following echocardiographic evaluations: (i) total isovolumic time (s/minute, T-IVT, global asynchrnony); (ii) LV filling time/RR interval (FT, global atrioventricular asynchrony); (iii) difference between time form ECG Q to peak velocity of RV free wall and maximally delayed LV segment (ms, DRL, global interventricular); (iv) standard deviation of time from ECG Q to systolic peak velocity of 12 LV segments (ms, Ts-SD12) and maximum difference of time to systolic peak velocity among 12 LV segments (ms, Ts-max, intraventricular systolic segmental); (v) sum of time exceeding aortic closure in strain curves of 12 LV segments (ms, o-ExcT, contractile diastolic); (vi) SD of time from ECG Q to early diastolic peak velocity of 12 LV segments (ms, Te-SD12) and maximum difference of time to early diastolic velocity among 12 LV segments (ms, Te-max, intraventricular diastolic segmental). Results: The prevalence of systolic segmental asynchrony was higher in the hypertensive group (56.7% vs 11.1%, p=0.02, by cut-off 40ms of DRL; 55.6% vs 13.3%, p=0.004, by cut-off 32 ms of Ts-SD12; 46.7% vs 13.3%, p=0.021, by cut-off 100 ms of Ts-max). DRL, Ts-12SD and Ts-max were also greater. conclusions: LV systolic segmental asynchrony was highly prevalent in the newly diagnosed hypertension.

 

Normal controls

 (n=15) 

Hypertensive patients 

 (n=45)

T-IVT (second/minute)

7.8 ± 1.5

8.7 ± 2.9

FT

0.54 ± 0.1

0.5 ± 0.06

DRL

27.2 ± 25.6

52.9 ± 42.5*

Ts-SD12

26.3 ± 14.1

35.7 ± 12.6*

Ts-max

76.9 ± 34.4

103.9 ± 38.1*

o-ExcT

379.5 ± 186.2

474.4 ± 322.2

Te-SD12

17.2 ± 7.8

21.1 ± 8.6

Te-max

61.3 ± 25.7

67.4 ± 25.2

*P<0.05 compared with normal controls



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