Left Atrial Size and Function

Impact of mild hypertension on left atrial size and function.

BACKGROUND Left atrial (LA) enlargement has been documented to occur in moderate and severe hypertension. METHODS AND RESULTS One hundred twelve mild hypertension patients were prospectively recruited and compared with 198 healthy volunteers. All recruits had a transthoracic echocardiogram. Maximum LA biplane volume, minimum LA biplane volume, and pre 'p'-LA biplane volume were measured, and ...

comparison of left atrial function between hypertensive patients with normal atrial size and normotensive subjects using strain rate imaging technique

Left Atrial Size and Function in Hypertrophic Cardiomyopathy Patients and Risk of New-Onset Atrial Fibrillation.

BACKGROUND The value of left atrial (LA) diameter, volume, and strain to risk stratify hypertrophic cardiomyopathy patients for new-onset atrial fibrillation (AF) was explored. METHODS AND RESULTS A total of 242 hypertrophic cardiomyopathy patients without AF history were evaluated by (speckle-tracking) echocardiography. During mean follow-up of 4.8±3.7 years, 41 patients (17%) developed new-...

Left Atrial Size and Function in a Canine Model of Chronic Atrial Fibrillation and Heart Failure

BACKGROUND Our aim was to assess how atrial fibrillation (AF) induction, chronicity, and RR interval irregularity affect left atrial (LA) function and size in the setting of underlying heart failure (HF), and to determine whether AF effects can be mitigated by vagal nerve stimulation (VNS). METHODS HF was induced by 4-weeks of rapid ventricular pacing in 24 dogs. Subsequently, AF was induced ...

Left atrial relaxation and left ventricular systolic function determine left atrial reservoir function.

BACKGROUND Determinants of left atrial (LA) reservoir function and its influence on left ventricular (LV) function have not been quantified. METHODS AND RESULTS In an open-pericardium, paced (70 and 90 bpm) pig model of LV regional ischemia (left anterior descending coronary constriction), with high-fidelity LV, LA, and RV pressure recordings, we obtained the LA area with 2D automated border ...