Publications by authors named "Daniel Carcamo"
Objectives: Here, we present the first record of stable colonies of the South American fur seal (Arctocephalus australis), in an area where their presence has never been documented (hereafter distribution gap), as well as an update of the current distribution range of the species in central Chile.
Results: A national synoptic aerial census of pinnipeds was performed during the austral summer of 2019 on the Chilean coast. An additional aerial census was conducted in the same area during the austral spring of 2019 as well as a maritime census during the austral summer of 2020.
Background: Acute ischemic stroke (AIS) is one of the leading causes of death in Chile. Intravenous thrombolysis (IVT) is an effective treatment. Geographical barriers and lack of specialists limit its application.
View Article and Find Full Text PDFBackground: We aim to evaluate clinical features and transcranial Doppler (TCD) elements, as predictors of the development of ischemic events (IEs) in patients suffering from spontaneous carotid arterial dissection without stroke (CCADW).
Methods: Consecutive patients with CCADW, seen in Clínica Alemana de Santiago between April 2004 and January 2015, were evaluated clinically, and with TCD, microembolic signals (MES) monitoring and breath hold Index (BHI) test were performed.
Results: Forty-one patients with 45 CCADW were included.
Background And Purpose: Collateral circulation (CC) has been associated with recanalization, infarct volume, and clinical outcome in patients undergoing acute reperfusion therapies. However, its relationship with the development to malignant middle cerebral artery infarction (mMCAi) has not been evaluated. Our aim was to determine the impact of CC using multiphase computed tomographic angiography (during the acute stroke phase in the prediction of mMCAi.
View Article and Find Full Text PDFBackground: Sonothrombolysis (ST) is an emerging modality for the treatment of stroke.
Aim: To assess the feasibility to perform ST in a Chilean hospital.
Material And Methods: Patients attended at a private clinic with an acute ischemic stroke, between September 2002 and May 2013 and eligible for endovenous thrombolysis, were studied with a transcranial Doppler (Spencer PMD 100 or 150®).
Background: Little is known about the relationships between different systolic blood pressure (SBP) thresholds and their outcomes in acute intracerebral hemorrhage (ICH). We aimed to determine the associations of potential systolic blood pressure (SBP) thresholds with hematoma growth (HG) and clinical outcome in patients with acute ICH.
Methods: 117 patients with acute (<6 h) spontaneous supratentorial ICH underwent blood pressure monitoring at 15 min interval over the first 24 h.
Background And Purpose: The accuracy of diffusion-weighted imaging (DWI) for the diagnosis of acute cerebral ischemia among patients with suspected ischemic stroke arriving to an emergency room has not been studied in depth.
Methods: DWI was performed in 712 patients with acute or subacute focal symptoms that suggested an acute ischemic stroke (AIS), 609 of them with AIS.
Results: DWI demonstrated a sensitivity of 90% and specificity of 97%, a positive likelihood ratio of 31 and a negative likelihood ratio of 0.
Exclusion criteria for intravenous thrombolysis in stroke mimics: an observational study.
J Stroke Cerebrovasc Dis
October 2013
Background: Stroke mimics (SMs) are frequent in emergency departments (EDs), but are treated infrequently with intravenous recombinant tissue plasminogen activator (rt-PA) thrombolysis. We aimed at identifying the factors that lead to the exclusion of SMs from thrombolytic therapy.
Methods: Consecutive patients presenting to the ED between December 2004 and March 2011 with symptoms that suggested acute ischemic stroke were included.
Between 5% and 37% of patients are not suitable for transtemporal insonation with transcranial Doppler (TCD). This unsuitability is particularly frequent in elderly females and non-Caucasians. We aim to evaluate TCD efficiency in a mixed Hispanic population in Santiago, Chile and to determine whether factors associated with the presence of optimal windows depend exclusively on patient-related elements.
View Article and Find Full Text PDFBackground: Regional differences in stroke mortality rates have been described in Chile. These could be related to the distribution of cardiovascular risk factors, the quality of medical care or socioeconomic status influencing incidence or case fatality rates. Our objective was to investigate variables explaining the variability in stroke mortality rates in the different regions of Chile.
View Article and Find Full Text PDFBackground: The clinical diagnosis of brain death is complex.
Aim: To evaluate the diagnostic accuracy of transcranial Doppler (TCD) for brain death.
Patients And Methods: Patients seen on the intensive care unit of a private hospital between January 2004 to December 2008, were included if they were in structural coma, had no craniectomy and had a blind evaluation by a neurologist and TCD done in less than three hours.
Background: Transcranial Doppler (TCD) ultrasound can demonstrate dynamic information. We aimed to evaluate whether TCD generates useful additional information in the emergency room after a multimodal stroke imaging protocol and also whether this modified the management of patients with cerebral infarction.
Methods: Patients admitted between April 2006 and June 2007 with ischemic stroke of less than 24 h were subjected to a protocol consisting of non-contrast brain CT, computed tomography angiography, diffusion-weighted magnetic resonance imaging and then TCD within the following 6 h by an observer blinded to the results of imaging studies.