Author + information
- Satish Ramkumara,b,
- Hong Yanga,b,
- Ying Wanga,b,
- Mark Nolana,b,
- Kazuaki Negishia,b and
- Thomas Marwicka,b
Background: Assessing risk of atrial fibrillation(AF) allows closer surveillance and earlier thromboprophylaxis. The association of risk with atrial function further validates clinical risk assessment.
Hypothesis: Atrial mechanics is associated independently with AF risk.
Methods: In a community study of 576 pts(age 70.7±4.7 yrs, male 46%), participants ≥65 years were recruited if they had 1 or more risk factor(eg. hypertension(HTN), diabetes mellitus(DM) and obesity). Baseline echo was undertaken and atrial strain analysis was conducted in all patients using P-P gating. Five year AF risk was assessed using the CHARGE-AF score. Patients were split into four groups based on AF risk (low 0-5%, medium 5-10%, high 10-15% and very high >15%). The association between atrial reservoir/conduit and pump strain and AF risk was assessed using univariable and multivariable linear regression.
Results: Pts in the higher AF risk groups were older and had higher rates of HTN, DM and ischaemic heart disease(p<0.05). Higher AF risk was associated with lower mean atrial reservoir strain(37.4±5.6 in lowest vs. 34.1±7.4 in highest risk, p=0.001) and lower atrial pump strain(18.2±4.1 in lowest vs. 16.4±4.7 in highest risk,p=0.02). Atrial conduit strain was similar in all risk groups(p=0.10). Multivariable regression analysis showed that atrial reservoir/conduit and pump strain were all independently associated with AF risk(p<0.05).(Table).
Conclusions: Atrial mechanics is independently associated with AF risk.
Poster Hall, Hall C
Saturday, March 18, 2017, 9:45 a.m.-10:30 a.m.
Session Title: Innovative Use of Echocardiography
Abstract Category: 28. Non Invasive Imaging: Echo
Presentation Number: 1197-213
- 2017 American College of Cardiology Foundation