Relationships between sympathetic markers and heart rate thresholds for cardiovascular risk in chronic heart failure.

Background: Results of recent clinical trials have shown that in heart failure (HF) heart rate (HR) values > 70 beats/minute are associated with an increased cardiovascular risk. No information is available on whether the sympathetic nervous system is differently activated in HF patients displaying resting HR values above or below this cutoff.

Methods: In 103 HF patients aged 62.

Elevated resting heart rate as independent in-hospital prognostic marker in COVID-19.

Background: Scarce and non-homogeneous data are available on the prognostic value of clinic heart rate (HR) in coronavirus disease 2019 (COVID-19).

Methods: The present study evaluated in 389 patients hospitalized for COVID-19 the in-hospital prognostic value of resting HR, assessed over different time periods, i.e.

Transient effects of carotid baroreflex stimulation via the neck chamber device on central venous pressure.

We examined in 11 young subjects (age 29.7±3.6 years, mean±SEM) whether carotid baroreceptor stimulation via the neck chamber device may affect central venous pressure (CVP), thus potentially involving other reflexogenic areas in the examined responses.

Sympathetic Overactivation in Patients With Essential Hypertension and Hepatic Iron Overload.

Iron overload has been recently shown to be associated with a hyperadrenergic state in genetic hemochromatosis. Whether this is also the case in essential hypertension, characterized by sympathetic activation and frequently by body iron overload, is unknown. In 17 healthy normotensive controls (age 52.