title: 'Inappropriate' sinus tachycardia: does the 100 beats per min cut-off matter?
abstract: Sinus tachycardia is commonly encountered in clinical practice and when persistent, can result in significant symptoms and impaired quality of life, warranting further evaluation. On the other hand, a growing body of epidemiological and clinical evidence has shown that high resting heart rate (HR) within the accepted normal range is independently associated with increased risk of all-cause and cardiovascular mortality. However, higher HR as a risk factor for adverse cardiovascular outcomes is frequently underappreciated. In this review, we focus on two challenging problems that span the spectrum of abnormally fast sinus HR. The first section reviews inappropriate sinus tachycardia, a complex disorder characterized by rapid sinus HR without a clear underlying cause, with particular emphasis on current management options. The latter section discusses the prognostic significance of elevated resting HR and reviews clinical evidence aimed at modifying this simple, yet highly important risk factor.
authors: Division of Cardiology, University of Louisville, ACB/A3L42, 550 South Jackson Street, Louisville, KY 40202, USA.
authors: Rashmi U
authors: RU
authors: Hottigoudar
authors: Rakesh
authors: R
authors: Gopinathannair
mesh_terms: D000328:Adult; D001341:Autonomic Nervous System / Q000503:physiopathology; D001552:Benzazepines / Q000627:therapeutic use; D017115:Catheter Ablation; D054815:Cyclic Nucleotide-Gated Cation Channels / Q000627:therapeutic use; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D000077550:Ivabradine; D011379:Prognosis; D012016:Reference Values; D012307:Risk Factors; D013616:Tachycardia, Sinus / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D016896:Treatment Outcome
chemical_list: D001552:Benzazepines; D054815:Cyclic Nucleotide-Gated Cation Channels; D000077550:Ivabradine