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University Hospital, LMU Munich

7 ARTICLES PUBLISHED IN JoVE

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Medicine

Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine
Daphne P M De Wijs-Meijler *1, Kelly Stam *2, Richard W B van Duin 1, Annemarie Verzijl 2, Irwin K Reiss 3, Dirk J Duncker 2, Daphne Merkus 2
1Experimental Cardiology and Neonatology, Erasmus MC, 2Experimental Cardiology, Erasmus MC, 3Neonatology, Erasmus MC

Here we present a protocol to assess cardiopulmonary function in awake swine, at rest and during graded treadmill exercise. Chronic instrumentation allows for repeated hemodynamic measurements uninfluenced by cardiodepressive anesthetic agents.

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Medicine

Isolation and Culture of Resident Cardiac Macrophages from the Murine Sinoatrial and Atrioventricular Node
Ruibing Xia 1,2,3, Simone Loy 1, Stefan Kääb 1,3, Anna Titova 1, Christian Schulz 1,2,3, Steffen Massberg 1,2,3, Sebastian Clauss 1,2,3
1University Hospital Munich, Department of Medicine I, Ludwig-Maximilian-Unversity Munich (LMU), 2Insitute of Surgical Research at the Walter Brendel Center of Experimental Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), 3German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance (MHA)

The protocol presented here provides a step-by-step approach for the isolation of cardiac resident macrophages from the sinoatrial node (SAN) and atrioventricular node (AVN) region of mouse hearts.

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Medicine

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
Philipp Tomsits 1,2,3, Kavi Raj Chataut 1,2, Aparna Sharma Chivukula 1,2, Li Mo 1,2, Ruibing Xia 1,2, Dominik Schüttler 1,2,3, Sebastian Clauss 1,2,3
1Department of Medicine I, University Hospital Munich, Campus Großhadern, Ludwig-Maximilians University Munich (LMU), 2DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), 3Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians University Munich (LMU)

Here we present a step-by-step protocol for a semiautomated approach to analyze murine long-term electrocardiography (ECG) data for basic ECG parameters and common arrhythmias. Data are obtained by implantable telemetry transmitters in living and awake mice and analyzed using Ponemah and its analysis modules.

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Medicine

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
Philipp Tomsits *1,2,4, Aparna Sharma Chivukula *1,2, Kavi Raj Chataut *1,2, Agus Simahendra 3, Ludwig T. Weckbach 1,2,3, Stefan Brunner 1, Sebastian Clauss 1,2,4
1Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University Munich (LMU), 2DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), 3Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University, 4Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, Ludwig-Maximilians University Munich (LMU)

Electrocardiogram (ECG) is the key variable to understanding cardiac electrophysiology. Physical exercise has beneficial effects but may also be harmful in the context of cardiovascular diseases. This manuscript provides a method of recording real-time ECG during exercise, which can serve to investigate its effects on cardiac electrophysiology in mice.

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Medicine

Preparation of Human Myocardial Tissue for Long-Term Cultivation
Jules Hamers 1,2, Payel Sen 1,2, Daphne Merkus 1,2,3, Thomas Seidel 4,5, Kun Lu 1,6, Andreas Dendorfer 1,2
1Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 2German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance (MHA), 3Division of Experimental Cardiology, Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, 4Institute of Cellular and Molecular Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 5Muscle Research Center Erlangen (MURCE), Friedrich-Alexander-Universität Erlangen-Nürnberg, 6Department of Cardiac Surgery, University Hospital, LMU Munich

We present a protocol for ex vivo cultivation of human ventricular myocardial tissue. It allows for detailed analysis of contraction force and kinetics, as well as the application of pre- and afterload to mimic the in vivo physiological environment more closely.

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An Innovative Toolkit to Investigate the Complex Mechanisms of Cardiac Arrhythmias
Sebastian Clauss 1,2,3,4
1Department of Medicine I, University Hospital Munich (LMU), Ludwig-Maximilians-University Munich (LMU), 2Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 3DZHK (German Centre for Cardiovascular Research) Partner Site Munich, Munich Heart Alliance (MHA), 4Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich

An Innovative Toolkit to Investigate the Complex Mechanisms of Cardiac Arrhythmias

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Biology

An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers
Shuxia Fan 1,2, Ben Raude 1,2,3, Florian Gaertner 1,2,4,5
1Department of Medicine I, University Hospital, LMU Munich, 2Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, LMU Munich, 3Department of Vascular Surgery, Charité-Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, 4Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer, Ludwig-Maximilians-University Munich, 5DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance

A detailed protocol for imaging single migrating platelets using RGD-functionalized avidin-biotin tethers with tunable density is provided, revealing that platelets generate enough force to rupture the avidin-biotin bond.

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