Evaluating tobacco retailer experience and compliance with a flavoured tobacco product restriction in Boston, Massachusetts: impact on product availability, advertisement and consumer demand.

Background: Flavoured tobacco products are widely available in youth-accessible retailers and are associated with increased youth initiation and use. The city of Boston, Massachusetts restricted the sale of flavoured tobacco products, including cigars, smokeless tobacco and e-cigarettes, to adult-only retailers. This paper describes the impact of the restriction on product availability, advertisement and consumer demand.

The Mechanism of Mitral Regurgitation Influences the Temporal Dynamics of the Vena Contracta Area as Measured with Color Flow Doppler.

Background: In patients with mitral regurgitation (MR), the effective regurgitant orifice area can be estimated by measuring the vena contracta area (VCA). We hypothesize that the VCA has characteristic temporal dynamics related to the underlying mechanism of functional mitral regurgitation (FMR) versus degenerative mitral valve disease (DMVD).

Methods: VCA measurements obtained by planimetry of the proximal jet from 3D transesophageal echocardiographic (TEE) color flow Doppler data sets were acquired in 42 cardiac surgical patients, including 22 with FMR and 20 with DMVD.