[Chest pain after angiography without anomalies]

BACKGROUND

Myocardial infarction can be categorized based on ECG-findings (presence or absence of ST-elevations on STEMI/NSTEMI) or on the results from coronary angiography (CAG) (presence or absence of obstructive atherosclerosis). Myocardial infarction without significant obstruction on CAG (Myocardial Infarction with Non-Obstructive Coronary Arteries/Atherosclerosis; MINOCA) occurs in up to a quarter of patients with myocardial infarcts. These patients have a higher risk of future heart diseases; up to a quarter of MINOCA patients suffer from heart diseases during a median follow-up of four years.

CASE DESCRIPTION

We describe a 55-year old woman, who suffered from two myocardial infarctions in one week. The first time, no ST-elevation was detected with ECG and CAG was without abnormalities (MINOCA). Five days later, she experienced the same symptoms; ECG showed ST-elevations and CAG revealed a coronary dissection.

CONCLUSION

Patients with a myocardial infarction without coronary obstruction (MINOCA) have a higher risk of future heart diseases. In this case, a coronary dissection.

[A dyspnoeic male with abnormal QRS complexes]

A 69-year-old patient came to the Emergency Department with dyspnea on exertion. ECG showed QRS alternans and echocardiography showed pericardial effusion. The diagnosis 'pericarditis carcinomatosis' was made after pericardial fenestration. QRS alternans is caused by the swinging motion of the heart, due to the excess of pericardial fluid.

Magnetic navigation in percutaneous coronary intervention

Magnetic navigation is the use of adjustable magnetic fields to precisely direct wires and equipment for clinical applications. It is a recently developed option that is now available for interventional cardiology. Procedures are based on the production of a three-dimensional reconstruction of the vessel lumen from standard angiographic images. Knowledge of the positions of the table and image intensifier during angiography allows calculation of the vessel coordinates in real space within the patient's chest. The applied magnetic field can be changed at any time to redirect the wire tip in order to improve navigation through complex and tortuous anatomy. The digital information of the coronary reconstruction can be used in further novel ways. Firstly, the integration of multislice computerized tomography images adds information about the path of the previous lumen of chronic total occlusions. Secondly, the computed center-line of the reconstructed vessel can be superimposed onto the live fluoroscopy images as a three-dimensional guide. The combination of improved navigation together with the other available system features may improve time, contrast, and material usage in a range of coronary lesions. Future potential developments include improvements in equipment and software, and potential therapeutic strategies under consideration include the use of equipment to perform remote control procedures, and the integration of the system to improve bone marrow-derived stem cell delivery.