Short time effects of two radiofrequency ablation methods on hypertrophic obstructive cardiomyopathy.

Background: Radiofrequency ablation has been applied for the treatment of hypertrophic obstructive cardiomyopathy (HOCM). The two known procedures are percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) and endocardial radiofrequency septal ablation (ERSA).

Methods: This study presents a retrospective analysis of the PIMSRA and ERSA procedures in patients with drug-refractory HOCM.

[Analytical method and comparison for static and dynamic headspace gas chromatography of anisole in water].

Objective: To establish and compare the method of static headspace gas chromatography hydrogen flame detector (static headspace method) and purge and trap gas chromatography-mass spectrometry (dynamic headspace method) of anisole in water.

Methods: Nitrogen gas was used as carrier gas in the static headspace method, 5 g NaCl as matrix modifier was added into 10 ml water. The sample was balanced with high speed vibration at 75°C for 30 min, and anisole was detected by gas chromatography and quantified with external standard.