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Martin A. Ritter
University of Münster
RadiologyCardiologyTranscranial DopplerStrokeMedicine
100Publications
25H-index
1,853Citations
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Publications 100
Newest
#1Florian ReinkeH-Index: 12
#2Markus BettinH-Index: 6
Last. Ralf DittrichH-Index: 29
view all 10 authors...
BACKGROUND AND PURPOSE: Detection of occult atrial fibrillation (AF) is crucial for optimal secondary prevention in stroke patients. The AF detection rate was determined by implantable cardiac monitor (ICM) and compared to the prediction rate of the probability of incident AF by software based analysis of a continuously monitored electrocardiogram at follow-up (stroke risk analysis, SRA); an optimized AF detection algorithm is proposed by combining both tools. METHODS: In a monocentric prospecti...
5 CitationsSource
BACKGROUND: Atrial fibrillation (AF) is an important cause of stroke. Continuous electrocardiography (ECG) monitoring with software-based analysis algorithms has been suggested to enhance the AF detection rate. We investigated the ability of stroke risk analysis (SRA) in the detection of AF in acute stroke patients. METHODS: Consecutive stroke patients numbering 1,153 were screened. Patients with cardioembolic stroke related to AF (n = 296, paroxysmal n = 63, persistent n = 233) and patients wit...
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#1Anna Lena FisseH-Index: 4
#2André KemmlingH-Index: 22
Last. Jens MinnerupH-Index: 28
view all 9 authors...
BACKGROUND AND AIMS: Sleep related breathing disorders (SRBD) are common in patients with ischemic stroke and are associated with poor outcome. SRBD after stroke were assumed to be a direct consequence of injury of specific central nervous system structures. However, whether specific locations of ischemic infarcts cause SRBD is yet unknown. We therefore investigated the association of ischemic lesion location with SRBD. METHODS: Patients with acute ischemic stroke treated on our stroke unit were...
9 CitationsSource
#1Anna Lena FisseH-Index: 4
#2Johannes PueschelH-Index: 1
Last. Martin A. RitterH-Index: 25
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Background: There is an unmet need for screening methods to detect and quantify cerebral small vessel disease (SVD). Transcranial Doppler ultrasound (TCD) flow sp
2 CitationsSource
Purpose: To prove the tissue-protecting effect of mechanical recanalization, we assessed the CT perfusion-based tissue outcome (“TO”) and correlated this imaging parameter with the 3-month clinical outcome (“CO”). Materials and Methods: 159 patients with large intracranial artery occlusions revealing mechanical recanalization were investigated by CCT, CT angiography (CTA) and CT perfusion (CTP) upon admission. For the final infarct volume, native CCT was repeated after 24 h. The “TO” (“percentag...
2 CitationsSource
#1Simon Kochhäuser (WWU: University of Münster)H-Index: 12
#2H. H. LohmannH-Index: 1
Last. Gerold Mönnig (WWU: University of Münster)H-Index: 27
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Background Clinically silent lesions on cerebral magnet resonance imaging have been found in larger numbers after pulmonary vein isolation (PVI) especially with phased radio frequency (pRF) using all ten electrodes. However, the neuropsychological effects of cerebral microembolism during the procedure remain unclear and data regarding this issue so far are inconsistent.
14 CitationsSource
#1Werner Hacke (Heidelberg University)H-Index: 113
#2Peter D. Schellinger (RUB: Ruhr University Bochum)H-Index: 16
Last. Tomás SeguraH-Index: 25
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Background and Purpose—On the basis of phase II trials, we considered that transcranial laser therapy could have neuroprotective effects in patients with acute ischemic stroke. Methods—We studied transcranial laser therapy in a double-blind, sham-controlled randomized clinical trial intended to enroll 1000 patients with acute ischemic stroke treated ≤24 hours after stroke onset and who did not undergo thrombolytic therapy. The primary efficacy measure was the 90-day functional outcome as assesse...
35 CitationsSource
#1Simon Kochhäuser (WWU: University of Münster)H-Index: 12
#2Dirk G. Dechering (WWU: University of Münster)H-Index: 16
Last. Lars Eckardt (WWU: University of Münster)H-Index: 8
view all 9 authors...
Background and Purpose—Supraventricular premature beats (SPBs) may help to assess the risk of atrial fibrillation (AF) in patients with cryptogenic stroke and therefore guide therapy. Methods—An internal loop recorder was implanted in consecutive patients with acute cryptogenic stroke. The occurrence and quantity of SPBs and short supraventricular runs (SVRs) in 24-hour ECG in patients with and without future AF were analyzed. We evaluated the relative risk of the upper quartile of SPB and SVR p...
37 CitationsSource
#1Stephan Zellerhoff (WWU: University of Münster)H-Index: 21
#2Martin A. Ritter (WWU: University of Münster)H-Index: 25
Last. Gerold Mönnig (WWU: University of Münster)H-Index: 27
view all 14 authors...
Aims Phased radiofrequency (RF) ablation for atrial fibrillation is associated with an increased number of silent cerebral lesions on magnetic resonance imaging and cerebral microembolic signals (MESs) on transcranial Doppler ultrasound imaging compared with irrigated RF. The increased rate of embolic events may be due to a specific electrical interference of ablation electrodes attributed to the catheter design. The purpose of this study was to elucidate the effect of deactivating the culprit e...
25 CitationsSource
#1Simon KochhäuserH-Index: 12
#2Florian ReinkeH-Index: 12
Last. Martin A. Ritter (WWU: University of Münster)H-Index: 25
view all 4 authors...
We thank the authors for the constructive comments in their letter to the Editor1 concerning our study about the detection of atrial fibrillation (AF) with an implantable loop recorder (ILR) and 7-day ECG in patients with cryptogenic stroke.2 We agree that the differences in detection rates of ILR and 7-day ECG during simultaneous recording need further explanation. The ILR detected AF in 3 patients of our study population within the first 7 days of the monitoring period. In 1 patient, AF was al...
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