Rare Case of Post-Partum Spontaneous Papillary Muscle Rupture in a 15-Year-Old.

A 15-year-old female who was 1-month post-partum presented with shortness of breath and hemoptysis. Echocardiography revealed findings suspicious for spontaneous papillary muscle rupture. We illustrate the evaluation, differential diagnosis, and management of spontaneous papillary muscle rupture. (Level of Difficulty: Beginner.).

Right and Left Ventricular Takotsubo: Same Two-Headed Monster or Different Beasts?

Right ventricular involvement in takotsubo cardiomyopathy is poorly understood and may be more common than previously reported. The significant hemodynamic ramification of this condition is elicited in this case report in which an 81-year-old female suffered a deadly biventricular takotsubo cardiomyopathy with subsequent resolution of left ventricular function but the persistence of right ventricular dysfunction. In this case, we highlight the importance of shifting focus to different recovery patterns within the two ventricles. Through a review of published cases, we have found an absence of attention to the right ventricle, an inconsistency in the appropriate diagnostic criteria of right ventricular takotsubo, and a lack of reporting on its recovery timing. This knowledge gap requires future studies.

Late Bacterial Endocarditis in an Intravenous Drug User With an Amplatzer Septal Occluder.

Infective endocarditis of a fully endothelialized cardiac prosthesis, and especially the late presentation of endocarditis, challenges our current understanding of device-related complications. Late bacterial endocarditis associated with the Amplatzer Septal Occluder, a device frequently used to close atrial septal defects, has been documented only rarely. We report the case of an intravenous drug user who had late infective endocarditis associated with his Amplatzer Septal Occluder, secondary to methicillin-sensitive Staphylococcus aureus bacteremia nearly 14 years after device insertion. The patient recovered after surgical excision and débridement of the vegetative mass, which may be the first time that a surgical approach has been taken to treat this condition. This report corroborates the need for late screening of high-risk patients who have septal occluder devices.

Bordetella hinzii: An Unexpected Pathogen in Native Valve Endocarditis.

Bordetella hinzii's route of transmission to human hosts and its pathogenicity remain unclear. Only a few cases have established this species as an opportunistic zoonotic disease. We introduce the first reported case of native aortic valve endocarditis presenting with fulminant aortic valve insufficiency that responded to conventional medical and surgical treatment. The patient did not have predisposing factors to this unusual infection. This case may provide a better understanding of the disease process, transmission, and pathogenicity of Bordetella hinzii.

Late perioperative native coronary artery spasm following bypass grafting in a patient with anomalous aortic origin of the coronary artery.

Native right coronary artery (RCA) spasm is a less frequent early complication of perioperative coronary artery bypass grafting. Late presentation at 6 days postoperation is scarce and its relationship with an anomalous coronary artery is unknown. The optimal management and prevention remains controversial. In the case presented, the patient's anomalous left coronary artery originating from the right coronary cusp underwent ligation at its proximal segment at the time of bypass grafting. This ligation was preformed to prevent competitive flow. Six days postoperation, a refractory spasm of dominant native RCA occurred. The spasm resulted in right ventricular failure. Administration of intracoronary verapamil had a longer sustained vasodilatory effect and resolution of coronary spasm when compared with intracoronary nitroglycerine injection. An intra-aortic balloon pump, inotropic agents and low-dose nitroglycerine were used to maintain adequate haemodynamic support. Right ventricular systolic function recovery was noted within 2 days postintervention.

Preservation of biomolecules in breast cancer tissue by a formalin-free histology system.

BACKGROUND: The potential problems associated with the use of formalin in histology, such as health hazards, degradation of RNA and cross-linking of proteins are well recognized. We describe the utilization of a formalin-free fixation and processing system for tissue detection of two important biopredictors in breast cancer - estrogen receptor and HER2 - at the RNA and protein levels. METHODS: Parallel sections of 62 cases of breast cancer were fixed in an alcohol-based molecular fixative and in formalin. Molecular fixative samples were processed by a novel formalin-free microwave-assisted processing system that preserves DNA, RNA and proteins. Formalin-fixed samples were processed using the conventional method. Estrogen receptor was assessed by immunohistochemistry and real-time PCR. HER2 was assessed by immunohistochemistry, FISH, CISH and real-time PCR. RESULTS: The immunohistochemical reaction for estrogen receptor was similar in molecular- and formalin-fixed samples (Spearman Rank R = 0.83, p < 0.05). Also HER2 result was similar to that of formalin-fixed counterparts after elimination of antigen retrieval step (Spearman Rank R = 0.84, p < 0.05). The result of HER2 amplification by FISH and CISH was identical in the molecular fixative and formalin-fixed samples; although a shorter digestion step was required when using the former fixative. Real-time PCR for both estrogen receptor and HER2 were successful in all of the molecular fixative specimens. CONCLUSION: The formalin-free tissue fixation and processing system is a practical platform for evaluation of biomolecular markers in breast cancer and it allows reliable DNA and RNA and protein studies.