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% Document Info
\author{thait}
\pdfinfo{
  /Title (cardiac-muscle-cheat-sheet.pdf)
  /Creator (Cheatography)
  /Author (thait)
  /Subject (Cardiac Muscle Cheat Sheet)
}

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\noindent
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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Cardiac Muscle Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{thait} via \textcolor{DarkBackground}{\uline{cheatography.com/213578/cs/46485/}}}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}thait \\
  \uline{cheatography.com/thait} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 27th May, 2025.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{2.04057 cm} x{2.93643 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Anatomy of the Heart}}  \tn
% Row 0
\SetRowColor{LightBackground}
4 Chambers Blood Circulation & Right AV valve (tricuspid) -\textgreater{} pulmonary(semilunar) valve -\textgreater{} left AV valve/bicuspid/mitral -\textgreater{} aortic/semilunar valve \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
Pulmonary circulation & Chambers on the right pump oxygen poor blood to the lungs \tn 
% Row Count 8 (+ 3)
% Row 2
\SetRowColor{LightBackground}
Systemic Circulation & Chambers on the left pump oxygen rich blood to body tissues \tn 
% Row Count 11 (+ 3)
% Row 3
\SetRowColor{white}
Right atrium & receives oxygen poor blood from inferior and superior vena cava \tn 
% Row Count 14 (+ 3)
% Row 4
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Right Ventricle & receives oxygen poor blood from the right atrium and pumps blood through the pulmonary valve into pulmonary artery \tn 
% Row Count 19 (+ 5)
% Row 5
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Left atrium & receives oxygen rich blood from pulmonary circulation via the left and right pulmonary veins \tn 
% Row Count 23 (+ 4)
% Row 6
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Left Ventricle & receives oxygen rich blood from left atrium and pumps blood through aortic valves into aorta \tn 
% Row Count 27 (+ 4)
% Row 7
\SetRowColor{white}
Chordae Tendinae & tendonous fibers attached to the inside edges of AV valves and base of ventricles via papillary muscles, prevents valves from everting \tn 
% Row Count 33 (+ 6)
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\begin{tabularx}{5.377cm}{x{2.04057 cm} x{2.93643 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Anatomy of the Heart (cont)}}  \tn
% Row 8
\SetRowColor{LightBackground}
Connective  Tissue & separates atria for ventricles providing attachment of heart valves \tn 
% Row Count 3 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.59264 cm} x{3.38436 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Electrical Activity}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{Autorhythmiticity} & heart muscle is capable of generating its own rhythmic electrical acticity \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Pacemaker activity & spontaneous, rhythmic generation of electrical impulses by specialized heart cells (like those in the sinoatrial node) that initiate and regulate the heartbeat, ensuring consistent cardiac contraction and blood circulation \tn 
% Row Count 12 (+ 9)
% Row 2
\SetRowColor{LightBackground}
SA Node & generates 70 AP per min, located in the wall of the right atrium near superior vena cava \tn 
% Row Count 16 (+ 4)
% Row 3
\SetRowColor{white}
AV Node & 50 AP per minute, located at the base of the right atrium follows the SA node \tn 
% Row Count 19 (+ 3)
% Row 4
\SetRowColor{LightBackground}
Bundle of His & specialized pacemaker cells originating at AV node projecting into left and rightventricles \tn 
% Row Count 23 (+ 4)
% Row 5
\SetRowColor{white}
Purkinje FIbers & 30 AP per min, spread throughout ventricular myocardium \tn 
% Row Count 26 (+ 3)
% Row 6
\SetRowColor{LightBackground}
Interatrial Pathway & specialized cardiac cells that conducts pacemaker activity from the right atrium to the left atrium \tn 
% Row Count 30 (+ 4)
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\par\addvspace{1.3em}

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\begin{tabularx}{5.377cm}{x{1.59264 cm} x{3.38436 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Electrical Activity (cont)}}  \tn
% Row 7
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Internodal Pathway & pathway of specialized cardiac cells that conducts pacemaker activity from SA to AV nodes \tn 
% Row Count 4 (+ 4)
% Row 8
\SetRowColor{white}
AV nodal delay & Pacemaker activity is conducted relatively slowly through the AV node resulting in a delay of approximately 100 ms \tn 
% Row Count 9 (+ 5)
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Electrocardiogram Waveforms}}  \tn
% Row 0
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P wave & Depolarization of the atria \tn 
% Row Count 1 (+ 1)
% Row 1
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QRS complex & depolarization of the ventricles \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
T wave & repolarization of the ventricles \tn 
% Row Count 5 (+ 2)
% Row 3
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PR segment & represents AV nodal delay \tn 
% Row Count 6 (+ 1)
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Mechanical Events of the Cardiac Cycle}}  \tn
% Row 0
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Systole & Contracting and emptying \tn 
% Row Count 2 (+ 2)
% Row 1
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Diastole & relaxation and filling \tn 
% Row Count 4 (+ 2)
% Row 2
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End Dastolic Volume & volume of blood in chamber at end of diastole , equivalent to max amount og blood chamber holds during cycle \tn 
% Row Count 10 (+ 6)
% Row 3
\SetRowColor{white}
Isovolumetric ventricular contraction & period of time during contraction when chambers stay closed  increasing chamber pressure during this periods \tn 
% Row Count 16 (+ 6)
% Row 4
\SetRowColor{LightBackground}
End systolic volume & amount of blood remaining in the chamber at the end of systole \tn 
% Row Count 20 (+ 4)
% Row 5
\SetRowColor{white}
Stroke volume & amount of volume blood pumped out of the chamber with each contraction \tn 
% Row Count 24 (+ 4)
% Row 6
\SetRowColor{LightBackground}
Stroke volume equation & EDV - ESV \tn 
% Row Count 26 (+ 2)
% Row 7
\SetRowColor{white}
Isovolumetric ventricular relaxation & period of time during relaxation when the chamber remains closed and therefore no blood can enter or leave, chamber pressure decreases then \tn 
% Row Count 33 (+ 7)
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\begin{tabularx}{5.377cm}{x{2.38896 cm} x{2.58804 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Mechanical Events of the Cardiac Cycle (cont)}}  \tn
% Row 8
\SetRowColor{LightBackground}
Lub & closure of AV valves \tn 
% Row Count 1 (+ 1)
% Row 9
\SetRowColor{white}
Dup & Closing of the semilunar valves \tn 
% Row Count 3 (+ 2)
% Row 10
\SetRowColor{LightBackground}
Murmurs & abnormal heart sounds from turbulent flow of blood through malfunctioning valves \tn 
% Row Count 7 (+ 4)
% Row 11
\SetRowColor{white}
Stenotic valve & stiff narrow valve that doesn't open completely , abnormal whistling sound \tn 
% Row Count 11 (+ 4)
% Row 12
\SetRowColor{LightBackground}
Insufficient valve & structurally damaged valve that does not close, abnormal swishing sound \tn 
% Row Count 15 (+ 4)
% Row 13
\SetRowColor{white}
Rheumatic fever & an auto-immune disease triggered by streptococcal bacteria that leads to valvular stenosis and insufficiency \tn 
% Row Count 21 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Regulation of Cardiac Output}}  \tn
% Row 0
\SetRowColor{LightBackground}
Cardiac Output & HR - SV \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Heart rate regulation done by & parasympathetic and sympathetic nervous systems \tn 
% Row Count 4 (+ 3)
% Row 2
\SetRowColor{LightBackground}
Stroke Volume & regulated intrinsically by volume of venous blood returning to the ventricles and extrinsically by the sympathetic nervous system \tn 
% Row Count 11 (+ 7)
% Row 3
\SetRowColor{white}
Parasympathetic & Vagus Nerve to the SA and AV nodes and to the contractile cells of the atria \tn 
% Row Count 15 (+ 4)
% Row 4
\SetRowColor{LightBackground}
Parasympathetic NTs & ACh and Muscarinic receptors \tn 
% Row Count 17 (+ 2)
% Row 5
\SetRowColor{white}
Effects of Parasympathetic Release of ACh & Increases permeability of SA nodal cells to K+ in the SA node leading to greater hyperpolarization and slowing of the K component of the pacemaker potential, in AV node increases permeability of AV nodal to K and in atrial contractile cells, shortens duration of cardiac fiber AP reducing Ca++ permeability \tn 
% Row Count 33 (+ 16)
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\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Regulation of Cardiac Output (cont)}}  \tn
% Row 6
\SetRowColor{LightBackground}
Sympathetic & Norepinephrine through beta adrenergic receptors \tn 
% Row Count 3 (+ 3)
% Row 7
\SetRowColor{white}
Effects of Sympathetic influence on HR & SA node - less hyperpolarization, acceleration of the K component, av node slowing increase in Ca++ permeability \tn 
% Row Count 9 (+ 6)
% Row 8
\SetRowColor{LightBackground}
Stroke Volume Regulation & Extrinsically regulated by neural control and intrinsically by the volume of venous blood returning to heart \tn 
% Row Count 15 (+ 6)
% Row 9
\SetRowColor{white}
Intrinsic control & direct correlation between end-diastolic  volume and stroke volume \tn 
% Row Count 19 (+ 4)
% Row 10
\SetRowColor{LightBackground}
Heart failure & inability of CO to meet emands of the body \tn 
% Row Count 22 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.44333 cm} x{3.53367 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Basic Organization}}  \tn
% Row 0
\SetRowColor{LightBackground}
Arteries & composed of large vessels that carry blood from the heart \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Arterioles & small diameter vessels that arise from the branching of arteries \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{Capillaries} & smallest diameter vessels that are formed when arterioles branch \tn 
% Row Count 9 (+ 3)
% Row 3
\SetRowColor{white}
Venules & the vessels that form when capillaries join together \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
Veins & large diameter vessels formed by merging of venules \tn 
% Row Count 13 (+ 2)
% Row 5
\SetRowColor{white}
\seqsplit{Microcirculation} & name given to collection of arterioles, capillaries and venules \tn 
% Row Count 16 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.74195 cm} x{3.23505 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Blood Flow}}  \tn
% Row 0
\SetRowColor{LightBackground}
Blood flow & determined by pressure gradient in the vessels and resistance to flow caused by friction and viscosity of the blood \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
Blood flow equation & F=deltaP/R \tn 
% Row Count 7 (+ 2)
% Row 2
\SetRowColor{LightBackground}
F & Flow rate, volume of blood passing through a vessel per unit of time \tn 
% Row Count 10 (+ 3)
% Row 3
\SetRowColor{white}
Delta P & Pressure gradient - difference in pressure between the beginning and end of the vessel \tn 
% Row Count 14 (+ 4)
% Row 4
\SetRowColor{LightBackground}
Resistance & depends on blood viscosity, vessel length, vessel radius \tn 
% Row Count 17 (+ 3)
% Row 5
\SetRowColor{white}
Blood viscocity & friction developed in blood determined by the concentration of plasma proteins and number of circulating RBCs \tn 
% Row Count 22 (+ 5)
% Row 6
\SetRowColor{LightBackground}
Vessel length & friction between blood and the inner surface of a vessel is proportional to the vessel length \tn 
% Row Count 26 (+ 4)
% Row 7
\SetRowColor{white}
Vessel radius & friction between blood and the inner surface of a vessel is inversely proportional to the  4th power of  the vessel radius \tn 
% Row Count 31 (+ 5)
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\par\addvspace{1.3em}

\vfill
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\begin{tabularx}{5.377cm}{x{1.74195 cm} x{3.23505 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Blood Flow (cont)}}  \tn
% Row 8
\SetRowColor{LightBackground}
Pressure resovoir & Serves as a driving force during ventricular diastole,  elasticity of the of artery walls smooth muscle, collagen, elastin \tn 
% Row Count 5 (+ 5)
% Row 9
\SetRowColor{white}
Pulse Pressure & pressure difference between systolic pressure and diastolic pressure \tn 
% Row Count 8 (+ 3)
% Row 10
\SetRowColor{LightBackground}
Mean Arterial Pressure & pressure that is monitored and regulated by BP reflexes \tn 
% Row Count 11 (+ 3)
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Intrinsic (local control)}}  \tn
% Row 0
\SetRowColor{LightBackground}
intrinsic control & factors intrinsic to an organ or tissue \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Local metabolic changes & factors derived from metabolic activity causing dilation. smooth muscle tone is controlled by release of mediators such as NO \tn 
% Row Count 7 (+ 5)
% Row 2
\SetRowColor{LightBackground}
O2 concentration & reduced O2 during metabolic demand \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
CO2 concentration & increased CO2 during metabolic demand \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
pH & increases in CO2 and or lactic acid lowers blood pH \tn 
% Row Count 14 (+ 3)
% Row 5
\SetRowColor{white}
Extracellular K+ conc. & increased neuronal activity that outpaces the Na+/K+ ATPase \tn 
% Row Count 17 (+ 3)
% Row 6
\SetRowColor{LightBackground}
Osmolarity & increased solute concentration resulting from metabolic activity \tn 
% Row Count 20 (+ 3)
% Row 7
\SetRowColor{white}
Adenosine & released in Cardiac muscle in response to metabolic demand \tn 
% Row Count 23 (+ 3)
% Row 8
\SetRowColor{LightBackground}
\seqsplit{Prostaglandins} & produced from teh metabolism of faty acids \tn 
% Row Count 25 (+ 2)
% Row 9
\SetRowColor{white}
Histamine release & release when tissues are damaged and leads to vasodilation accompanying  an inflammatory response \tn 
% Row Count 29 (+ 4)
% Row 10
\SetRowColor{LightBackground}
local physical control & temperature and myogenic response \tn 
% Row Count 31 (+ 2)
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\par\addvspace{1.3em}

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\begin{tabularx}{5.377cm}{x{1.84149 cm} x{3.13551 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Intrinsic (local control) (cont)}}  \tn
% Row 11
\SetRowColor{LightBackground}
Temperature & arteriolar smooth muscle tone is inversely proportional to temperature \tn 
% Row Count 3 (+ 3)
% Row 12
\SetRowColor{white}
Myogenic response & arteriolar smooth muscle responds to stretch by contracting \tn 
% Row Count 6 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}