Abstract: Methods for optically detecting lipoproteins, in particular lipoprotein(a), in a sample. In some embodiments, the methods include contacting a sample with an associative lipophilic dye, subjecting the sample to electrophoretic separation through a separation medium, and detecting the dye. Kits comprising microchips for performing a separation of lipoproteins, including lipoprotein(a), are also provided.

Abstract: The invention is a method of classifying, diagnosing, prognosticating, and predicting cardiovascular disease conditions or other biological states using genes identified using microarray technology.

Abstract: The invention identifies genes whose expression is upregulated or downregulated following mechanical offloading in subjects with heart failure. The invention provides compositions comprising a targeting agent conjugated to a functional moiety, wherein the targeting agent selectively binds to a polypeptide encoded by one of these genes. The functional moiety can be an imaging agent, therapeutic agent, etc. The invention further provides methods for providing diagnostic or prognostic information related to heart failure involving detecting expression or activity of an expression product of one or more of the identified genes. The invention further provides diagnostic and therapeutic methods comprising detecting or administering an apelin peptide to a subject.