Changes in left ventricular synchrony and systolic function in dilated cardiomyopathy patients with fragmented QRS complexes.

Aims: Fragmented QRS (f-QRS) complexes are associated with adverse cardiovascular events in patients with coronary heart disease; however, the effects on patients with dilated cardiomyopathy (DCM) remain elusive. This study is to investigate the changes of left ventricular (LV) synchrony and systolic function in DCM patients with f-QRS complexes.

Methods And Results: Twenty DCM patients with f-QRS complexes and 29 DCM patients without f-QRS (n-QRS) complexes were enrolled.

[The impact of cardiac resynchronization therapy on left ventricular diastolic function evaluated by speckle tracking imaging in patients with dilated cardiomyopathy].

Objective: To investigate the effects of cardiac resynchronization therapy (CRT) on left ventricular (LV) diastolic function measured by speckle tracking imaging (STI) in patients with dilated cardiomyopathy (DCM).

Methods: CRT was performed in 21 DCM patients [15 male, mean age: 61.2 ± 11.

Assessment of left ventricular dyssynchrony and cardiac function in patients with different pacing modes using real-time three-dimensional echocardiography: Comparison with tissue Doppler imaging.

The aim of this study was to evaluate the left ventricular mechanical dyssynchrony (LVMD) and left ventricular dysfunction of patients in AAI, DDD and VVI pacing modes using real-time three-dimensional echocardiography (RT3DE) and tissue Doppler imaging (TDI). The results from the RT3DE and TDI were subsequently compared. Twenty patients with sick sinus syndrome (SSS) who had undergone the implantation of a dual-chamber pacemaker were enrolled in this study and the pacemakers were programmed to AAI, DDD and VVI modes, sequentially.

[Evaluation of left ventricular function and twist in patients with diabetic cardiovascular autonomic neuropathy by speckle tracking imaging].

Objective: To evaluate left ventricular (LV) function and twist in patients with diabetic cardiovascular autonomic neuropathy (CAN) by two-dimensional speckle tracking imaging (STI).

Methods: STI was performed in 56 subjects with type 2 diabetes mellitus (DM) (35 with DM only: group A, 21 with CAN: group B) and 34 normal subjects (Control) from LV short-axis view. LV peak systolic, peak early (E') and peak late (A') diastolic circumferential strain in 18 myocardial segments were measured at the levels of mitral annulus, papillary muscle and apex and the rotation at mitral annulus and apex levels were also measured.

[Evaluation on left ventricular systolic synchronicity and cardiac function in patients with permanent cardiac pacing by real-time three-dimensional echocardiography].

Objective: To determine the feasibility on the left ventricular systolic synchronism and cardiac function evaluation in patients with permanent cardiac pacing by real-time three-dimensional echocardiography.

Methods: Fifteen patients with sick sinus syndrome post dual-chamber pacemaker implantation were enrolled in this study. Pacemakers were programmed to AAI, DDD, and VVI respectively.

[The value of diagnosis of the harmonic imaging ultrasonic integrated backscatter on the very early stage of acute myocardial infarction].

Objective: To study change and the value of diagnosis of harmonic imaging ultrasonic integrated backscatter (IBS) on the very early diagnosis of acute myocardial infarction (AMI).

Method: 72 patients were divided 2 groups, A group 30 cases with AMI at the very early stage of acute myocardial infarction (in 2 hours), B group 42 cases with typical acute myocardial infarction (in 2 - 12 hours) were examined by IBS and the cyclic variation of integrated backscatter (CVIB) with HP-5500 ultrasonic system in the segment of myocardial infarction and no myocardial infarction.

Results: In A group the IBS of the segment of AMI are very higher than that of the segment of no AMI [(18.